My Cheap Reed Diffuser Lasted for Weeks but Stopped Projecting After Day 10 — Was It Actually Good Value?

My Cheap Reed Diffuser Lasted for Weeks but Stopped Projecting After Day 10 — Was It Actually Good Value?

 

★ ★ How long the liquid lasts and how long it fills a room are two different measurements sold under one word — and only the second is what you were buyingReed diffusers 50ml from ₹749 · 130ml from ₹1,249 · duo sets from ₹1,498 · oil refill 300ml ₹2,399 · free shipping above ₹499A portion funds girl-child education
★ SOSA Reed Diffusers · scented weeks, not weeks of liquid
Divide what you paid by the number of weeks the room still read at the doorway — not by the number of weeks there was something in the glass
★ ★ ★ ★ ★
★★★★★
"I had been counting weeks of liquid and calling it lifespan. Counting the weeks it actually read at the door changed the whole sum."
Pallavi S. Vijayawada
Morning Freshness 50ml ₹749
★★★★★
"Ten loud days and seven silent weeks. I thought the bottle had failed; really I had bought the wrong measurement."
Nitin R. Agra
First SOSA bottle after a cheap one
★★★★★
"Marking the open date and taking one doorway reading a week is the only honest test I have found. It takes ten seconds."
Shruti M. Siliguri
Fresh Brew 130ml ₹1,349
★★★★★
"A smaller opening and a longer flat middle. Told plainly, before I bought, which is why I bought."
Abhishek D. Rourkela
Evening Calm 50ml ₹799
★★★★★
"Turned out my room was the problem, not the bottle. The draught was costing me weeks and level at once."
Yamini V. Nellore
Moved it, then bought
★★★★★
"I stopped comparing millilitres. Cost per scented week is a number I can actually check for myself."
Irfan H. Bhagalpur
300ml refill ₹2,399
★★★★★
"I had been counting weeks of liquid and calling it lifespan. Counting the weeks it actually read at the door changed the whole sum."
Pallavi S. Vijayawada
Morning Freshness 50ml ₹749
★★★★★
"Ten loud days and seven silent weeks. I thought the bottle had failed; really I had bought the wrong measurement."
Nitin R. Agra
First SOSA bottle after a cheap one
★★★★★
"Marking the open date and taking one doorway reading a week is the only honest test I have found. It takes ten seconds."
Shruti M. Siliguri
Fresh Brew 130ml ₹1,349
★★★★★
"A smaller opening and a longer flat middle. Told plainly, before I bought, which is why I bought."
Abhishek D. Rourkela
Evening Calm 50ml ₹799
★★★★★
"Turned out my room was the problem, not the bottle. The draught was costing me weeks and level at once."
Yamini V. Nellore
Moved it, then bought
★★★★★
"I stopped comparing millilitres. Cost per scented week is a number I can actually check for myself."
Irfan H. Bhagalpur
300ml refill ₹2,399
SOSA Morning Freshness reed diffuser, 6 to 8 weeks of settled plateauMorning Freshness ₹749 SOSA Fresh Brew Coorg coffee and Kerala vanilla reed diffuserFresh Brew ₹849 SOSA Evening Calm reed diffuser for a bedroomEvening Calm ₹799 SOSA oil-only reed diffuser refill, 300ml, 8 to 11 monthsOil refill 300ml ₹2,399 SOSA Day and Night reed diffuser duo set, two 50ml bottlesDay & Night duo ₹1,498
★ ★ 6–8 weeks of plateau, ₹749 ₹749 The cheapest scented week we sell ₹2,399
✓ Two measurements, one word — weeks of liquid is not weeks of fragrance ✓ Every figure here is arithmetic on SOSA prices and SOSA ranges, shown in full ✓ Free shipping above ₹499 · a portion of every order funds girl-child education

 

Founder Diaries · Reader Question · What Value Measures
By Sonal Sahani · ISIPCA Versailles 9 min read Updated August 2026
You were sold one number and you needed a different one. "How long it lasts" almost always means how long there is still liquid in the glass. What you were actually buying is how many weeks the room reads of something when you walk into it — and those two measurements come apart badly. A bottle that stopped filling a room on day ten and then sat there for another seven weeks gave you roughly a week and a half of the thing you wanted and seven weeks of decoration. Whatever it cost, the honest divisor is the first number, not the second. I will not tell you what your old bottle was worth, because I do not know what you paid for it and I do not price or rate anything I did not make. What I can give you is the method, my own figures, and the arithmetic in full so you can check it.
Quick answers — read this first
Value is price divided by scented weeks. Not by weeks of liquid, not by millilitres, not by the height of the first weekend.

Count them yourself. Write the open date on the box and take one reading a week at the doorway, walking in from another room. Count the weeks it still reads.

Our own numbers, shown: ₹749 over 6–8 weeks is ₹749 ÷ 8 ≈ ₹94 a week at best and ₹749 ÷ 6 ≈ ₹125 at worst.

The cheapest scented week we sell is a refill. ₹2,399 over 8–11 months — call it 35 to 48 weeks — is ₹2,399 ÷ 48 ≈ ₹50 to ₹2,399 ÷ 35 ≈ ₹69 a week, into your own glass and reeds.
The short answer
Short answer: probably not good value, but for a reason worth understanding rather than resenting — you were comparing the wrong measurement. Ten days of projection is ten days of product regardless of how long the glass stayed wet afterwards. Before you spend again, run the count on whatever you buy next: open date on the box, one doorway reading a week, and divide the price by the weeks it still reads. If you want our figures to test against, a 50ml at ₹749 is built to hold its settled level through most of 6–8 weeks.
Why the two numbers separate: every reed diffuser is loudest in its first days, when six dry reeds are freshly soaked and the lightest top notes leave together. It then settles to a plateau. If that plateau sits below what your room needs to register it, the bottle keeps consuming oil while reading as nothing — liquid falling, room silent. The other way it happens is a stalled wick: the reeds saturate, the oil stops moving, and the level barely drops for weeks. Same silence, opposite glass.
Shop: Morning Freshness ₹749 · ₹1,249 · Evening Calm ₹799 · ₹1,299 · Fresh Brew ₹849 · ₹1,349 · oil refill 300ml ₹2,399 · 500ml ₹3,499. Free shipping above ₹499.
In this guide
₹749 ÷ 8 weeks ≈ ₹94 a week · ₹749 ÷ 6 ≈ ₹125 — the range, not a promise
Morning Freshness 50ml · ₹749
The highest settled level in the range, which is the number that counts
Fresh Brew 50ml · ₹849
₹2,399 over roughly 35–48 weeks ≈ ₹50–₹69 a week, in your own glass
300ml refill · ₹2,399
Straight answer
Was a bottle that held liquid for weeks but stopped projecting on day ten good value?
1. On the measurement that matters, no. You bought a scented room and received about a week and a half of one. The liquid that remained afterwards was not the product; it was the packaging of a product that had already stopped being delivered.

2. Two numbers travel under one word. Weeks of liquid is easy to state, easy to verify and flattering. Scented weeks is the thing you experience and nobody prints it, because it depends on the room as well as the bottle.

3. Count it yourself next time, because nobody can count it for you. Write the open date on the box. Once a week, walk in from another room and take the first breath at the doorway. Count the weeks it still reads there. That number is your divisor.

4. Here is our arithmetic, in full. ₹749 ÷ 8 weeks ≈ ₹94 a week, or ₹749 ÷ 6 ≈ ₹125 at the short end of the range. A 130ml at ₹1,249 over 14–18 weeks is ₹1,249 ÷ 18 ≈ ₹69 a week, or ₹1,249 ÷ 14 ≈ ₹89.

5. The cheapest scented week in our range is a refill into a vessel you already own. ₹2,399 for 8–11 months is roughly 35 to 48 weeks: ₹2,399 ÷ 48 ≈ ₹50 a week, ₹2,399 ÷ 35 ≈ ₹69. Oil only — no glass, no reeds, and replacement reeds are not sold separately.

6. Do the free things before you compute anything. A draught from an AC, a fan or an open balcony removes scent faster than reeds release it and empties the bottle sooner. A bottle judged in a wind tunnel will score badly however good it is.

7. And if what you want is ten loud days, buy something built for that. A candle from ₹379 is an evening; a Sukoon at ₹1,899 is scent on demand. Neither is a stronger reed diffuser.

Everything is composed and handmade in small batches in Pune, tested through 45°C summer heat and 85% monsoon humidity, and a portion of every order supports girl-child education through Nanhi Kali.
TL;DR: weeks of liquid and weeks of fragrance are two measurements sold as one, and only the second is what you paid for. Divide the price by the weeks the room still read at the doorway. Our own figures, shown rather than asserted: ₹749 ÷ 6–8 weeks ≈ ₹94–₹125; ₹2,399 ÷ 35–48 weeks ≈ ₹50–₹69.
SOSA Fresh Brew reed diffuser 50ml, judged on its settled plateau rather than its opening
Judge a bottle on its plateau, because that is the part you live with
SOSA Fresh Brew · Coorg coffee & Kerala vanilla ₹849 / 50ml
Of the five compositions this one settles highest — roasted Coorg coffee over Kerala vanilla, 9.5 on SOSA's own internal strength scale at six reeds, a position on our scale rather than an industry standard or a concentration. It has the same three-phase shape as every reed diffuser ever made: a loud opening, a fortnight of settling, then a plateau that holds through most of 6–8 weeks. Only the height of the plateau differs between scents, and the plateau is where your scented weeks come from. ₹849 ÷ 8 ≈ ₹106 a week at the long end. Living rooms, kitchens and offices rather than bedrooms; 130ml ₹1,349 for 14–18 weeks at the same level.
Shop Fresh Brew →

Part one — the two numbers behind one word

Every claim about how long a reed diffuser lasts is answering one of two questions, and the industry rarely says which. One is about the glass. The other is about the room. They can differ by a factor of five in the same bottle, and the gap between them is where the disappointment lives.

1
MEASUREMENT ONE · WEEKS OF LIQUID
Easy to state, easy to verify, and almost useless to you
This is the number on the box, and it is not a lie — there really was something in the glass for eight weeks. It is simply answering a question you did not ask. A bottle can hold liquid for a very long time precisely because it has stopped releasing it: saturated reeds carry very little, so consumption slows to almost nothing and the level barely moves. In that state, "it lasted for weeks" and "it stopped working" are the same sentence. The tell is the level. A bottle emptying steadily is delivering; one whose level has not shifted in a month is not. When we quote 6–8 weeks for a 50ml, we mean at six reeds with the bottle running, not the survival of a puddle.
The check: put a strip of tape at the level on day one. A line that does not move is not longevity.
2
MEASUREMENT TWO · SCENTED WEEKS
The number you actually bought, and the one nobody prints
SOSA Evening Calm reed diffuser, Kashmir lavender and chamomileEvening Calm₹799 · 50mlA scented week is a week in which walking into the room from somewhere else produces a first breath of the fragrance. That is the whole definition, and it is a reading you can take in ten seconds without equipment. Nobody prints it because it is not a property of the bottle alone — it depends on the room's volume, its airflow and whether the door is ever shut. The same bottle honestly delivers different scented weeks in a 120 sq ft bedroom and a 250 sq ft living room with a balcony open. Which is why I would rather teach the count than quote a figure: you are the only person who can measure your flat, and any brand quoting a projection figure for your room, including this one, is guessing.
The formula: what you paid, divided by the weeks it still read at the doorway. Nothing else.
3
WHY THEY COME APART · THREE ROUTES
A high opening, a low plateau, or a wick that has stalled
The first route is compositional. A very volatile, front-loaded fragrance gives an enormous first week and has little left to hold a middle; the liquid remains because what is left is the heavy end that leaves the reed slowly. The second is the room: a plateau that would read perfectly in a closed bedroom sits below the threshold of a large open zone, so the bottle consumes and you notice nothing. The third is the wick — saturated reeds, a wet line pushed high, a level that stops falling. All three produce the same customer sentence and they have completely different answers: a different composition, a different room, or a fresh set of reeds. That is why a value question turns into a diagnosis before it turns into a purchase.

Part two — five measurements, and what each hides

Five numbers you can quote about a reed diffuser, ranked by how much they tell you about what you will actually experience. Only the starred one is worth dividing a price by.

Five ways to measure a bottle · only one is value
What each number counts, how to take it, and what it quietly leaves out
The measurement What it actually counts How to take it yourself Why it is the number usually quoted What it hides
Scented weeks ★ Weeks the room still reads at the doorway Open date on the box; one entry reading a week It is not — it varies by room, so nobody prints it Nothing. This is the thing you bought
Weeks of liquid remaining How long something is visible in the glass Look at the bottle Verifiable, flattering, and true as stated That a stalled bottle lasts longest of all
The opening, days one to three Freshly soaked reeds and departing top notes Impossible to miss It is the most impressive moment a bottle has That it is a start-up condition nothing can hold
Volume in millilitres Reservoir size, and therefore duration Read the label Bigger sounds stronger That size buys weeks, never metres, at the same reed count
Reed count you ended up running The real volume control, and its price in weeks Count what is standing in the bottle Rarely mentioned at all That nine reeds run a 50ml down in about five weeks, not eight
The honest caveat: our own 6–8 and 14–18 week figures are weeks of a working bottle at six reeds, and they are typical ranges rather than guarantees — a hot room finishes a bottle sooner because warmth raises the evaporation rate, a humid stretch slows evaporation from the reed surface so the bottle lasts longer and reads quieter, and a draught costs you level and weeks at the same time. Those are directions of effect, not measured rates. Your scented-week count will also be lower than your liquid count on any bottle, ours included, if the room is large, open or ventilated. And a week in which you personally stopped noticing the fragrance is not necessarily an unscented week: living with a constant and ceasing to register it is ordinary, which is why the reading is taken at the doorway on arrival, or by someone who has just come in.
Shop this guide
Three ways to buy a scented week
SOSA Morning Freshness reed diffuser 50mlMorning Freshness 50ml · ₹749 ÷ 6–8 weeks₹749Shop → SOSA Evening Calm reed diffuser 130mlEvening Calm 130ml · ₹1,299 ÷ 14–18 weeks₹1,299Shop → SOSA oil-only reed diffuser refill 300ml300ml refill · ₹2,399 ÷ 35–48 weeks₹2,399Shop →
The SOSA principle
The plateau is the product. A loud opening flatters every bottle equally; the settled middle is the only part worth paying for, and the only part worth counting.
Which is an uncomfortable position for us commercially, because the opening is what sells and the middle is what gets judged.

Part three — why the room is half of any value figure

Here is the part that stops this page being a sales argument. Scented weeks are a property of a bottle and a room, and the room can ruin the number on its own. A flat with excellent cross-ventilation, an open balcony, a ceiling fan or an AC blowing across the shelf removes scent faster than six reeds release it, and warmth raises the evaporation rate at the same time — so you lose on both measurements simultaneously, a quieter room and an earlier empty. Any bottle bought into that room will score badly, including ours. Before you compute a cost per scented week on anything, run the free ladder: fifteen minutes with the door shut, flip all six reeds, move the bottle to an inner wall at waist-to-chest height away from the draught, and read it at the threshold. Only measure once the room has stopped sabotaging the measurement.

There is also a compositional trade behind why openings and plateaus diverge, and I would rather state it than let it look like a coincidence. Phthalate solvents push fragrance hard off a reed and win the first week convincingly — they also degrade in heat, and in an Indian summer a bottle carrying them can turn thin and slightly acrid by around week six, which is the smell people describe as "it went off". SOSA is phthalate-free on a heat-stable coconut-derived CCT carrier, and the honest description of that choice is a smaller opening in exchange for a longer, flatter plateau that still smells like itself at the end. If your last bottle was enormous for ten days and gone by day eleven, you have met one end of that trade. We chose the other end, and it costs us the first impression every single time.

And there is a case where the answer is not a reed diffuser at all, which no arithmetic will change. If what you want is a loud, obvious, room-filling scent for an hour of your choosing, a passive diffuser is the wrong instrument by design — no fan, no heat, no switch, constant and deliberately low. A jar candle from ₹379 is an evening in one room while you are in it. A Sukoon at ₹1,899 is fragrance on demand: 270–320 sq ft, 16–18 hours on low, remote and timers, three 15ml Hotel Collection fragrances in the box — bought for control, never as a stronger bottle. It delivers by aerosolising water, so it adds moisture where a reed bottle adds none. Reeds are for the weeks you are not thinking about it. That is what they are worth, and the only thing they are worth.

Ten loud days and seven silent weeks is not an eight-week bottle. It is a ten-day bottle with seven weeks of packaging still on the shelf.
— Sonal Sahani, SOSA

Part four — the arithmetic, done in full

Every figure below is our listed price divided by our stated range, with the division shown. They are ranges rather than promises, and the low end assumes a room that is not fighting you.

Cost per scented week
SOSA prices, SOSA ranges, and the sums written out
What you buy Price Weeks it is built to read for The division What the number does not include
300ml oil refill, into a vessel and reeds you own ★ ₹2,399 8–11 months ≈ 35–48 weeks ₹2,399 ÷ 48 ≈ ₹50 · ₹2,399 ÷ 35 ≈ ₹69 Reeds, which are not sold separately and will need refreshing
500ml oil refill ₹3,499 14–18 months ≈ 61–78 weeks ₹3,499 ÷ 78 ≈ ₹45 · ₹3,499 ÷ 61 ≈ ₹57 The same, over a longer run — plan for two sets of reeds
Morning Freshness 130ml ₹1,249 14–18 weeks ₹1,249 ÷ 18 ≈ ₹69 · ₹1,249 ÷ 14 ≈ ₹89 Nothing — glass and six reeds are in the box
Morning Freshness 50ml ₹749 6–8 weeks ₹749 ÷ 8 ≈ ₹94 · ₹749 ÷ 6 ≈ ₹125 Nothing, and it is the cheapest way to test the format
Day & Night duo, two rooms at once ₹1,498 6–8 weeks each, run together ₹1,498 ÷ 8 ≈ ₹187 a week for two scented rooms That it is two rooms, not one louder room
The same 50ml, run at nine reeds ₹749 Roughly 5 weeks instead of 8 ₹749 ÷ 5 ≈ ₹150 That you bought level and paid for it in weeks — knowingly
Doing nothing until you have fixed the room ₹0 — No division required Nothing. This is the first move for most people reading this
Honest notes for buyers: every figure in this guide is arithmetic on SOSA's own listed prices and SOSA's own stated longevity ranges, shown in full so you can check it; the ranges are typical rather than guaranteed and no per-week figure is a promise about your flat. No competing product, brand or category is named, priced, rated or compared here, and no figure is claimed for anything SOSA does not make. A reed diffuser adds fragrance to a room. It does not clean, purify or filter air, remove or neutralise cooking, damp or smoke smells, reduce humidity, or change how anyone feels. Warmth raises the evaporation rate, humidity slows it from the reed surface, and moving air carries vapour away from the bottle — directions of effect, not measured rates. Reed count is the volume control and bottle size the duration control. Not noticing a fragrance you live with is ordinary olfactory adaptation, and the reliable checks are leaving the room and coming back, or asking someone who has just arrived. SOSA has no 100ml reed diffuser — the sizes are 50ml and 130ml. Refills are oil only and replacement reeds are not sold separately. Reed oil never goes into a machine, and the water-based Hotel Collection never goes into a reed bottle. Fragrance oil is flammable — keep bottles away from open flame and direct sunlight, on a tray, and out of reach of children and pets. Made in Pune; free shipping above ₹499, and a portion of every order supports girl-child education through Nanhi Kali.
SOSA oil-only reed diffuser refill 300ml, the lowest cost per scented week in the range
The lowest cost per scented week we sell
SOSA reed diffuser refill · oil only ₹2,399 / 300ml
300ml runs roughly 8–11 months, which is about 35 to 48 weeks: ₹2,399 ÷ 48 ≈ ₹50 a week at the long end and ₹2,399 ÷ 35 ≈ ₹69 at the short one, against ₹749 ÷ 6–8 for a fresh 50ml. In per-millilitre terms that is about ₹7–8 against ₹15–17. The catch is honest and worth stating: it is oil only — no glass, no reeds — so it assumes you kept the bottle and that your reeds are still pale, even and wicking. Replacement reeds are not sold separately, and our guidance is to refresh them every few months, so plan a fresh bottle at some point in that run and keep its reeds. Lift the reeds out, pour to the neck, return them, flip once. Gloves, and a tray.
Shop the 300ml refill →
SS
ISIPCA
Versailles
A note from Sonal

When I was deciding what to print on a SOSA box, the temptation was to quote the largest defensible number. There is always one available, and it is always the weeks-of-liquid number. I could not work out how to print it without knowing it would be read as a promise about the room, which it is not. So we quote 6–8 and 14–18 weeks at six reeds and say plainly that they are ranges for a working bottle.

The measurement I actually trust is the one you take yourself at your own doorway, and it is worth more than anything a brand can tell you — including me. It costs nothing, it needs no equipment, and it is the only figure that accounts for your ceiling height, your balcony and the fan you leave running.

What I would ask, in return for the arithmetic on this page being real, is that you apply the same test to us. Mark the date. Walk in from the corridor once a week. Count. If the number is poor, move the bottle before you conclude anything, and if it is still poor after that, we have not earned the money. Made in small batches in Pune, and a part of every order funds a girl's classroom through Nanhi Kali.

Frequently asked questions

How do I work out cost per scented week?
Write the open date on the box. Once a week, walk into the room from somewhere else and take the first breath at the doorway. Count the weeks it still reads there, then divide what you paid by that count. For our own range: ₹749 ÷ 6–8 weeks ≈ ₹94–₹125 for a 50ml, ₹1,249 ÷ 14–18 ≈ ₹69–₹89 for a 130ml, and ₹2,399 ÷ 35–48 ≈ ₹50–₹69 for a 300ml refill into your own glass.
Is a bottle that still has liquid in it necessarily still working?
No, and the reverse can be truer than people expect. Oil leaves a reed diffuser only by evaporating off the reeds, so a level that has stopped falling means delivery has stopped. A bottle whose reeds have saturated will hold liquid for a very long time while reading as nothing at all, which is the least valuable state a bottle can be in.
Why did it seem so strong for the first ten days?
Because that is the shape of every reed diffuser. Six dry reeds soak for the first time and present the widest wet surface they ever will, while the lightest top notes leave together. Both are one-off events. The settled level afterwards is the specification, and it is the level your scented-week count should be measuring.
Would a bigger bottle have given me more scented weeks?
More weeks of liquid, yes; more scented weeks only if the plateau was already reading in your room. At six reeds a 130ml projects exactly as a 50ml does — it lasts 14–18 weeks instead of 6–8. If the room was too large or too ventilated for the smaller bottle, the larger one reads exactly as quietly for three times as long.
Can you tell me whether the bottle I bought before was good value?
No, and I would not try. I do not know what you paid, and I do not price, rate or make claims about products I did not compose — that applies to every page on this blog. What I can do is give you the method and my own arithmetic, in full, and let you run the same test on us.
Reader question · what value measures · 2026
Divide by the weeks it filled the room — not the weeks it held liquid
Open date on the box, one doorway reading a week, and count. Our own arithmetic, shown: ₹749 ÷ 6–8 weeks ≈ ₹94–₹125 for a 50ml; ₹1,249 ÷ 14–18 ≈ ₹69–₹89 for a 130ml; ₹2,399 ÷ 35–48 ≈ ₹50–₹69 for a 300ml refill into your own glass. Ranges, not guarantees. A reed diffuser adds a fragrance alongside what is already in your air — it does not clean air or remove any smell. Free shipping above ₹499; a portion of every order funds girl-child education through Nanhi Kali.
Morning Freshness ₹749 → 300ml refill ₹2,399
Continue the read
More on "I can't smell it anymore"
Editorial standards & sources
About this guide: Written by Sonal Sahani, ISIPCA Versailles-trained founder and perfumer at SOSA Home & Body, on the difference between how long a reed diffuser holds liquid and how long it fills a room. No competing product, brand or category is named, priced, rated or compared, and no cost, lifespan or performance figure is stated for anything SOSA does not make. Every per-week figure is arithmetic on SOSA's listed prices and stated longevity ranges, shown in full; those ranges are typical rather than guaranteed and vary with warmth, humidity, airflow, room volume and reed count — directions of effect, not measured rates. Not noticing a constant fragrance is described as ordinary olfactory adaptation, with no timescale, percentage or research claimed and no technique presented as removing it. No claim is made that fragrance cleans air, removes any smell, reduces humidity, or affects health, mood or sleep. No climate figure is quoted for any city; the only test conditions stated are SOSA's own, 45°C and 85% relative humidity. The situation described is a general one readers may recognise and is not drawn from any customer, forum or third-party discussion.

SOSA range, specifications and prices used in this guide (verified from the live store, 27 August 2026): Reed diffusers — alcohol-free, phthalate-free, paraben-free and IFRA-compliant compositions on a heat-stable coconut-derived (CCT) carrier, low-VOC, in a refillable glass bottle with six fibre reeds; flip weekly. 50ml lasts 6–8 weeks and 130ml lasts 14–18 weeks; there is no 100ml reed diffuser size. Morning Freshness (Malabar lemon · peppermint · Nilgiri eucalyptus) 50ml ₹749 · 130ml ₹1,249; Garden Bloom (British rose · night-blooming jasmine) ₹799 · ₹1,299; Evening Calm (Kashmir lavender · chamomile) ₹799 · ₹1,299; Fresh Brew (Coorg coffee · Kerala vanilla) ₹849 · ₹1,349; Mountain Breeze (Himalayan pine · sage · Indian cedar) ₹849 · ₹1,349. Duo sets ₹1,498–₹1,598 for 2 × 50ml and ₹2,498–₹2,598 for 2 × 130ml. Oil-only refills 300ml ₹2,399 · 500ml ₹3,499 — the glass vessel and reeds are not included, and replacement reeds are not sold as a separate product. Machines: Boond 300ml ₹899 (~150 sq ft, about 6 hours a fill) · Sukoon 500ml ₹1,899 (270–320 sq ft, 16–18 hours on low, three 15ml fragrances included) · Megh 6L ₹3,499 (~215 sq ft — a runtime and humidity machine that covers less than a Sukoon, never a coverage upgrade) · waterless Vaayu ₹11,999 · Safar ₹3,999 (a car and travel product) · Aangan ₹25,999 · Meenar ₹38,500. The water-based Hotel Collection for ultrasonic machines (15ml ₹299 · 100ml ₹999 · 300ml ₹1,799 · pack of seven 15ml ₹1,799) cannot be used in a reed bottle or a Vaayu. Below ₹749: jar candles ₹379, Sandalwood or Smoked Oudh candle ₹449, wax melts ₹474 (a burner is required and not included), mugs ₹474, bubble and taper candles ₹569, Amber Rose candle ₹599, ceramic trinket dish and candle two-pack ₹664. A reed diffuser adds fragrance to a room. It does not clean, purify or filter air, remove or neutralise cooking, damp or smoke smells, reduce humidity, or change how anyone feels. A reed diffuser adds no moisture to the air; ultrasonic machines work by aerosolising water and therefore do. A persistent musty smell indicates moisture that needs finding and drying, and SOSA sells no dehumidifier or air purifier. Ventilate or extract first; add fragrance second. Evaporation rate rises with warmth and falls with humidity, and airflow carries scent away from the bottle — so performance varies with season, ventilation, ceiling height and room use; longevity figures are typical ranges, not guarantees. Not noticing a constant fragrance is ordinary olfactory adaptation; the reliable checks are leaving the room and returning, or asking someone who has just arrived. Strength figures are positions on SOSA’s own internal scale, not an industry standard. Fragrance oil is flammable — keep bottles away from open flame and out of direct sunlight, and out of reach of children and pets. Composed and handmade in small batches in Pune, India; tested through 45°C summer heat and 85% monsoon humidity. Free shipping above ₹499. A portion of every order supports girl-child education through Nanhi Kali. Prices subject to change — see the live product pages.
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