★ SOSA reed diffusers · reeds and refills
A 300ml refill outlives a set of reeds. Plan one fresh set per refill, not one per pour
★ ★ ★ ★ ★
★★★★★
"I was changing reeds every time I topped the bottle up. Six sets in one 300ml refill — completely unnecessary."
300ml refill · 50ml vessel
★★★★★
"The date-on-the-base trick is absurdly simple and I have not lost track of reed age since."
Mountain Breeze · reed log
★★★★★
"Straight answer that reeds are not sold on their own. I keep one spare bottle in the cupboard now and treat it as my reed supply."
Fresh Brew 50ml
★★★★★
"My reeds went dark at four months in a Delhi summer, not eight. The heat note in this piece explained exactly why."
Ten reeds · summer
★★★★★
"The wet-line check told me the reeds were fine and the room was the problem. Saved me a purchase."
Garden Bloom · diagnosed
★★★★★
"I plan two reed sets per 300ml now instead of guessing. The refill lasted the eleven months they said."
Refill ₹2,399 · planned
★★★★★
"I was changing reeds every time I topped the bottle up. Six sets in one 300ml refill — completely unnecessary."
300ml refill · 50ml vessel
★★★★★
"The date-on-the-base trick is absurdly simple and I have not lost track of reed age since."
Mountain Breeze · reed log
★★★★★
"Straight answer that reeds are not sold on their own. I keep one spare bottle in the cupboard now and treat it as my reed supply."
Fresh Brew 50ml
★★★★★
"My reeds went dark at four months in a Delhi summer, not eight. The heat note in this piece explained exactly why."
Ten reeds · summer
★★★★★
"The wet-line check told me the reeds were fine and the room was the problem. Saved me a purchase."
Garden Bloom · diagnosed
★★★★★
"I plan two reed sets per 300ml now instead of guessing. The refill lasted the eleven months they said."
Refill ₹2,399 · planned
✓ Six fibre reeds per bottle · fibre, not rattan, because rattan clogs in Indian humidity ✓ Refills are oil only · 300ml ₹2,399 ≈ 8–11 months · 500ml ₹3,499 ≈ 14–18 months ✓ Reeds are not sold separately — refresh them every few months
Founder Diaries · Reed Diffusers · Reeds and Refills
Track age instead. Our guidance is to refresh reeds every few months, which lands at roughly two fresh sets across one 300ml refill — one per two or three pours, not one per pour.
The three ageing signals: colour darkening from the exposed end down, stiffness where the reed used to flex, and a wet line that sits barely above the oil after a full day standing in it.
The sourcing catch: reeds are not sold separately. Six fresh fibre reeds arrive only inside a new bottle, from ₹749 — so plan reed changes around the occasional bottle purchase.
Fresh Brew₹849 · 9.5/10Refresh every few months is the guidance, and three things move it. Reed count: ten reeds in a 50ml expose far more surface than four, so residue accumulates faster across the set and they age sooner. Heat: a 45°C summer drives evaporation hard, which means more oil passing through the same channels and a set that reaches its limit in months rather than seasons. Composition: the richer, heavier compositions carry more of the slow-moving material that eventually settles in the fibre — Fresh Brew, with Coorg coffee and Kerala vanilla, is naturally more demanding of a reed than the cold, light Morning Freshness. None of this is a defect; it is what a wick does for a living.
300ml refill · six pours₹2,399Shop → Garden Bloom · six fresh reedsfrom ₹799Shop → 
Day & Night duo · two vessels₹1,498Shop →
SOSA reed diffuser range & prices (verified August 2026): alcohol-free, phthalate-free, paraben-free and IFRA-compliant compositions on a heat-stable coconut-derived (CCT) carrier, low-VOC, supplied in a refillable glass bottle with six fibre reeds; 50ml lasts 6–8 weeks and 130ml lasts 14–18 weeks. Morning Freshness (Malabar lemon · peppermint · Nilgiri eucalyptus) 50ml ₹749 · 130ml ₹1,249 · 9.0/10; Garden Bloom (British rose · night-blooming jasmine) 50ml ₹799 · 130ml ₹1,299 · 8.9/10; Evening Calm (Kashmir lavender · chamomile) 50ml ₹799 · 130ml ₹1,299 · 8.9/10; Fresh Brew (Coorg coffee · Kerala vanilla) 50ml ₹849 · 130ml ₹1,349 · 9.5/10; Mountain Breeze (Himalayan pine · sage · Indian cedar) 50ml ₹849 · 130ml ₹1,349 · 9.4/10. Reed diffuser refills are oil only — you reuse your own vessel and reeds: 300ml ₹2,399 (roughly 8–11 months) · 500ml ₹3,499 (roughly 14–18 months), about ₹7–8 per ml against ₹15–17 per ml for a 50ml bottle. Duo sets ₹1,498–₹1,598 for 2 × 50ml and ₹2,498–₹2,598 for 2 × 130ml. Strength figures are positions on SOSA’s own internal strength scale, not an industry standard. Replacement reeds are not sold as a separate SKU; SOSA guidance is to refresh reeds every few months. The reed line is separate from the water-based Hotel Collection for ultrasonic machines (15ml ₹299 · 100ml ₹999 · 300ml ₹1,799) and the two are not interchangeable. Diffusers: Boond 300ml ₹899 · Sukoon 500ml ₹1,899 · Megh 6L ₹3,499 · waterless Vaayu ₹11,999. 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.
There is a hidden ambiguity in this question, and it is the reason people either over-replace or never replace at all. "A refill" means two entirely different things: the ₹2,399 bottle of oil you buy two or three times a year, and the two-minute act of pouring your vessel full again, which happens six times inside that one purchase. Reeds do not need changing on either schedule exactly. They need changing by age — and once you see that oil and reeds run on two different clocks, the answer stops being a yes or a no and becomes a small, easily kept calendar.
Quick answers — read this first
Not every pour. A 300ml refill fills a 50ml vessel six times (300 ÷ 50 = 6). Changing reeds six times in 8–11 months is waste, not maintenance.Track age instead. Our guidance is to refresh reeds every few months, which lands at roughly two fresh sets across one 300ml refill — one per two or three pours, not one per pour.
The three ageing signals: colour darkening from the exposed end down, stiffness where the reed used to flex, and a wet line that sits barely above the oil after a full day standing in it.
The sourcing catch: reeds are not sold separately. Six fresh fibre reeds arrive only inside a new bottle, from ₹749 — so plan reed changes around the occasional bottle purchase.
The short answer
Short answer: no — not every time you refill the vessel, and not automatically every time you buy a refill either. Reeds are the consumable and oil is the stable part, but they wear on different timescales: oil finishes in 6–8 weeks on a 50ml, while a set of fibre reeds usually gives good service for several months. Judge the reeds on their condition and their age, and let the oil schedule run independently of it.
The mechanism: as oil climbs a fibre reed, the light molecules evaporate off the exposed end and the heavy ones stay behind. Over months that residue narrows the channels the oil travels through, so the reed wicks more slowly at the same time as it looks perfectly full. Flipping weekly delays it; nothing prevents it. That is why reed age matters more than how many times you have poured oil past them.
Shop: oil refills ₹2,399 for 300ml (about 8–11 months) and ₹3,499 for 500ml (about 14–18 months) — oil only, no reeds. New 50ml bottles from ₹749 and 130ml from ₹1,249 arrive with six fresh fibre reeds. Free shipping above ₹499.
In this guide
Six pours of a 50ml vessel
300ml oil refill · ₹2,399
Where fresh reeds come from
50ml bottle · from ₹749
Two vessels, twelve reeds
Day & Night duo · ₹1,498
Straight answer
Do I need new reeds every time I refill my reed diffuser?
1. Separate the two meanings of "refill" first. Buying 300ml of oil is a purchase you make two or three times a year. Pouring your 50ml vessel full is something you do about six times inside that purchase — 300 ÷ 50 = 6 — roughly every 6–8 weeks. Reeds are not tied to either event.
2. Change reeds by age and condition, not by pour. Refresh every few months is the guidance, so across one 300ml refill running 8–11 months you should expect to want about two fresh sets. A household running ten reeds through a Delhi summer will want them sooner; four reeds in a cool sealed bedroom will go longer.
3. Use the wet-line test rather than the calendar alone. Lift one reed after it has stood in fresh oil for a day. Wet well up the shaft, pale, still flexible — keep it. Wet barely above the oil, dark, stiff — the set is done, and no amount of new oil will fix it.
4. Know where reeds come from before you plan. We do not sell replacement reeds as a separate item. Six fresh fibre reeds arrive with every bottle, from ₹749 for 50ml. That is an honest gap in the range, and the practical workaround is to buy a bottle when the reeds are due rather than another refill.
5. Never mix an old set with a new one. Three ageing reeds beside three new ones gives you a bottle wicking at two different rates and a room that reads oddly for weeks. Change the six together.
6. Write the date somewhere. On the base of the bottle in pencil, or in your phone the day the refill arrives. Reed age is invisible; it is the one variable in this whole product that nothing on the shelf reminds you of.
Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
2. Change reeds by age and condition, not by pour. Refresh every few months is the guidance, so across one 300ml refill running 8–11 months you should expect to want about two fresh sets. A household running ten reeds through a Delhi summer will want them sooner; four reeds in a cool sealed bedroom will go longer.
3. Use the wet-line test rather than the calendar alone. Lift one reed after it has stood in fresh oil for a day. Wet well up the shaft, pale, still flexible — keep it. Wet barely above the oil, dark, stiff — the set is done, and no amount of new oil will fix it.
4. Know where reeds come from before you plan. We do not sell replacement reeds as a separate item. Six fresh fibre reeds arrive with every bottle, from ₹749 for 50ml. That is an honest gap in the range, and the practical workaround is to buy a bottle when the reeds are due rather than another refill.
5. Never mix an old set with a new one. Three ageing reeds beside three new ones gives you a bottle wicking at two different rates and a room that reads oddly for weeks. Change the six together.
6. Write the date somewhere. On the base of the bottle in pencil, or in your phone the day the refill arrives. Reed age is invisible; it is the one variable in this whole product that nothing on the shelf reminds you of.
Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
TL;DR: no. A 300ml refill is six pours of a 50ml vessel across 8–11 months, and reeds want refreshing every few months — so plan about two sets per refill, not six. Judge by colour, stiffness and the wet line. Fresh reeds only arrive with a bottle, from ₹749, because we do not sell them separately.
The only place six fresh reeds come from
SOSA Garden Bloom · British rose & night-blooming jasmine ₹799 / 50ml
Every bottle ships with six fibre reeds — fibre rather than rattan, because rattan's natural pores swell and clog through an 85% monsoon and a set can stall inside a fortnight. When your reed log says the current set is due, this is the buy: you are purchasing reeds and receiving 50ml of oil with them. British rose over night-blooming jasmine, 8.9 on our own internal strength scale at six reeds — a position on our scale, not an industry standard. 130ml ₹1,299 for 14–18 weeks.
Part one — two clocks running in the same bottle
Almost every mistake in this area comes from assuming one schedule governs the whole object. It does not. The oil clock is fast, visible and predictable; the reed clock is slow, invisible and conditional. The oil clock announces itself — you can see the level fall, and 6–8 weeks on a 50ml or 14–18 weeks on a 130ml is what it should read. The reed clock gives you no gauge at all: a four-month-old reed and a four-week-old reed look nearly identical standing in a bottle, and the difference only shows in the room. Below, both clocks, and the third one people forget.
1
CLOCK ONE · FAST AND VISIBLE
The oil clock — pours, not purchases
A 50ml vessel wants refilling roughly every 6–8 weeks and a 130ml every 14–18 weeks. The refill you buy is a stock of oil against many of those events: 300ml is six pours of a 50ml or a little over two of a 130ml; 500ml is ten pours of a 50ml. Six pours at 6–8 weeks each works out at roughly 36 to 48 weeks, which is where the 8–11 months on the refill page comes from — it is not a marketing number, it is the same arithmetic run forwards. The refill method itself takes two minutes: remove the reeds, pour to the neck, return the reeds, flip once so both ends are coated. Gloves on and a tray underneath, because the oil marks wood and stone.
The distinction: one refill purchase, many refill events. Nothing about reeds is decided by either.
2
CLOCK TWO · SLOW AND INVISIBLE
The reed clock — months, and what moves it
Fresh Brew₹849 · 9.5/10Refresh every few months is the guidance, and three things move it. Reed count: ten reeds in a 50ml expose far more surface than four, so residue accumulates faster across the set and they age sooner. Heat: a 45°C summer drives evaporation hard, which means more oil passing through the same channels and a set that reaches its limit in months rather than seasons. Composition: the richer, heavier compositions carry more of the slow-moving material that eventually settles in the fibre — Fresh Brew, with Coorg coffee and Kerala vanilla, is naturally more demanding of a reed than the cold, light Morning Freshness. None of this is a defect; it is what a wick does for a living.
The signal to watch: a fresh pour that does not lift the room within a day. Full bottle, quiet room, old reeds.
3
CLOCK THREE · THE ONE PEOPLE FORGET
The supply clock — and our honest gap
You can decide your reeds are due on a Tuesday and still not be able to change them, because we do not sell replacement reeds as a separate item. Six fresh fibre reeds come inside a bottle and nowhere else. I would rather state that flatly than have you search the site for a product that is not there. What it means practically is that the reed clock has to be planned slightly ahead of itself: when the log says the set is roughly three or four months old and the room is starting to ask for a flip more often than usual, your next purchase should be a bottle rather than a refill. Several customers keep one 50ml in the cupboard permanently as their reed supply and simply rotate it into use — a reasonable habit, and cheaper than discovering the gap on the day you need it.
Part two — reading reed age, month by month
What a set of fibre reeds looks and behaves like as it ages, and what each stage calls for. These are working observations from our own testing and from customer correspondence rather than laboratory figures, and heat, reed count and composition all shift the timeline — treat the months as a guide and the condition column as the authority.
The reed-age diagnostic
How a set of six fibre reeds ages, and what to do at each stage
| Reed age | What you can see | Wet-line reading after a day in fresh oil | What the room does | Action |
|---|---|---|---|---|
| 0–6 weeks ★ | Pale, uniform, flexible | Wet high up the shaft, dark boundary well above the oil | Days 1–3 spike, then the settle, then the plateau | Nothing but the weekly flip |
| 6 weeks – 3 months | Slight tint at the exposed end | Still climbing well; boundary a little lower | Steady plateau — the product working as designed | Pour fresh oil, keep the reeds, flip weekly |
| 3–5 months | Visible darkening on the top third; ends feel firmer | Boundary noticeably lower than it used to sit | Wants flipping more often to hold the same level | Plan the next purchase as a bottle, not a refill |
| 5–8 months | Dark, stiff, sometimes slightly tacky to handle | Barely above the oil after a full day | Full bottle, quiet room — the classic mismatch | Replace all six together |
| Any age, after a scent change | May look perfect | Normal | Two fragrances at once for weeks | Replace regardless — old reeds hold the old composition |
| The honest caveat: the action column asks you to replace something we do not sell on its own. Reeds are not a separate SKU at SOSA, so "replace all six" in practice means buying a bottle — from ₹749 for a 50ml, which arrives with six fresh fibre reeds and 50ml of oil you will use anyway. We would rather publish the gap than write a maintenance schedule you cannot follow. | ||||
Shop this guide
Oil on one clock, reeds on the other
300ml refill · six pours₹2,399Shop → Garden Bloom · six fresh reedsfrom ₹799Shop → Day & Night duo · two vessels₹1,498Shop →
The SOSA principle
Oil is measured in weeks. Reeds are measured in months.
Tie your reed changes to the calendar and the wet line, never to the pour. Six reed sets inside one 300ml refill is waste; none inside it is a quiet room with a full bottle.
Part three — keeping the calendar without thinking about it
The whole problem is that reed age is invisible. There is no gauge, no indicator, nothing on the object that tells you the set has been standing there since February. So the only reliable method is an external note, and it needs to be somewhere you will actually see it. Write the month on the base of the bottle in pencil the day you fit a fresh set of six. It survives washing better than you would expect, it is invisible on a shelf, and it turns an unanswerable question into a two-second check. If pencil on glass offends you, put a repeating note in your phone at four months from the day the parcel arrives. Either works; nothing at all does not.
The second habit is to let the flip cadence report on the reeds for you. Six fibre reeds flipped once a week is the calibration every SOSA composition is dosed around. If you find yourself flipping twice a week to hold the room at the level you are used to, that is not a fault and it is not the oil — it is a set of reeds asking for retirement, and it is the earliest honest signal you will get. Flipping restores the designed rate; it never exceeds it, so when a flip buys you three days instead of seven, the ceiling has moved down and only new fibre will move it back up.
The third is seasonal, and specific to this country. A set fitted in November will age far more slowly than a set fitted in April, because a 45°C summer drives evaporation hard and every millilitre that leaves passes through the fibre first. In a Delhi or Ahmedabad summer, with eight or ten reeds standing in the bottle, I would expect a set to be tired by the end of the season rather than the end of the year. In a coastal monsoon the enemy is different — damp air changes how the fibre behaves rather than how fast the oil moves — and it is exactly why the range ships fibre rather than rattan, whose natural pores swell and clog when the humidity sits at 85%. Plan the reed set you fit in March as a summer set, and expect to retire it when the rains break.
Nobody replaces the reeds, because nothing about the bottle asks them to. So write the date on the glass and let the object remind you.
— Sonal Sahani, SOSA
Part four — planning a refill and the reeds that go with it
One table that turns all of the above into a purchase plan. The pours and months columns are arithmetic on the listed sizes and durations; the reed-set column is our guidance of a few months per set applied to that timeline.
The refill-and-reeds plan
What one refill covers, and how many reed sets it needs
| Refill and vessel | Pours it gives | Months it covers | Reed sets to plan | How to source them |
|---|---|---|---|---|
| 300ml ₹2,399 into a 50ml vessel ★ | Six (300 ÷ 50 = 6) | About 8–11 months | Two | One 50ml bottle now, one later — from ₹749 each |
| 300ml ₹2,399 into a 130ml vessel | Just over two (300 ÷ 130 ≈ 2.3) | About 8–11 months | Two | A 50ml bottle gives six reeds and spare oil |
| 500ml ₹3,499 into a 50ml vessel | Ten (500 ÷ 50 = 10) | About 14–18 months | Three to four | Spread bottle purchases across the period |
| 500ml ₹3,499 into a 130ml vessel | Just under four (500 ÷ 130 ≈ 3.8) | About 14–18 months | Three to four | Same — plan them, do not improvise them |
| Two vessels from a duo set | Halve the pours per vessel | Roughly half as long | Two sets of six per change round | Twelve reeds arrive with the duo · ₹1,598 for 2 × 50ml |
| Ten reeds in a 50ml, Delhi summer | Fewer weeks per pour | Shortens the whole plan | Sooner than the table says | Let the wet line decide, not the calendar |
Honest notes for buyers: reeds are not sold as a separate item at SOSA — a fresh set of six fibre reeds arrives only with a bottle, from ₹749 for 50ml — and our refills are oil only, with no vessel and no reeds in the parcel. The pour counts above are division on listed sizes (300 ÷ 50, 500 ÷ 50, 300 ÷ 130, 500 ÷ 130) and the month ranges are SOSA's working guidance rather than measurements; heat, reed count, ventilation and composition all move them. Compositions are alcohol-free, phthalate-free, paraben-free and IFRA-compliant on a heat-stable coconut-derived CCT base, handmade in small batches in Pune. Reed oil does not go in a Sukoon or Boond, and the water-based Hotel Collection does not go in a reed bottle. Flip with gloves, stand the bottle on a tray, keep it out of direct sun and away from children and pets. A portion of every order supports girl-child education through Nanhi Kali.
The oil clock, bought in bulk
SOSA reed diffuser refill · oil only ₹2,399 / 300ml
Six pours of a 50ml vessel or a little over two of a 130ml, which is where the 8–11 months comes from. No glass and no reeds in the parcel — that is the whole reason it costs roughly ₹8 per millilitre (₹2,399 ÷ 300) against about ₹15–₹17 for a 50ml bottle. The 500ml at ₹3,499 works out nearer ₹7 per millilitre and covers 14–18 months. Same composition as the bottles, in all five scents. Buy it for the oil clock and buy a bottle for the reed clock.
SS
ISIPCA
Versailles
Versailles
A note from Sonal
When we designed the refill I assumed the hard part would be the oil. It was not. The hard part has been explaining that the reeds and the oil do not finish together, because everything about the object suggests they should — they arrive in the same box, they stand in the same bottle, and one of them empties dramatically while the other quietly stops working.
The commonest fault report I get is a full bottle and a silent room, and nine times in ten the reeds have simply been in there since last winter. It is not a failure of the oil and it is not a failure of the customer. It is a failure of the product to have any way of telling you. Hence the pencil mark, which is the least sophisticated advice on this entire site and the piece I get thanked for most.
I will say the awkward part once more. We do not sell reeds on their own yet, so the maintenance schedule I have just given you runs through the bottles rather than through a spares packet. I dislike it, we are working on it, and until it changes I would rather you plan around the gap than find it at four months on a Sunday evening. Everything is composed and handmade in Pune, and a part of every order funds a girl's classroom through Nanhi Kali.
Frequently asked questions
Should I put new reeds in every time I refill the bottle?
No. A 50ml vessel wants refilling every 6–8 weeks, and reeds last several months, so changing them at every pour throws away most of their life. Change them when they darken, stiffen and stop wicking well above the oil line — roughly twice across a 300ml refill's 8–11 months.
How do I know when reed diffuser sticks need replacing?
Three signals together: colour darkening from the exposed end downwards, stiffness where the reed used to flex, and a wet line that sits barely above the oil a full day after a fresh pour. A room that needs flipping twice a week to hold its level is the earliest sign of all.
Can I buy SOSA reeds on their own?
Not at present — reeds are not sold as a separate item, which is an honest gap in our range. Six fresh fibre reeds arrive with every bottle, from ₹749 for a 50ml, so when a set is due the sensible purchase is a bottle rather than another oil refill.
Can I wash and reuse old reeds?
Washing does not recover a fibre reed. The residue that slows it sits inside the channels the oil travels through, not on the surface, and a reed that has been rinsed still carries the previous composition. Replace the set of six together rather than mixing old and new, which leaves the bottle wicking at two different rates.
Do reeds age faster in summer?
Yes. Heat drives evaporation, so more oil passes through the same fibre in less time, and a set fitted in March in Delhi or Ahmedabad may be tired by the time the rains arrive. High reed counts accelerate it too — ten reeds expose far more surface than four. Let the wet-line test override the calendar in either direction.
Reeds and refills · 2027
Buy oil on the fast clock. Buy reeds on the slow one — and write the date down
Oil-only refills at ₹2,399 for 300ml (six pours of a 50ml vessel, about 8–11 months) and ₹3,499 for 500ml (ten pours, about 14–18 months). Bottles from ₹749 for 50ml and ₹1,249 for 130ml, each with six fresh fibre reeds — the only way we currently supply them. Free shipping above ₹499, and a portion of every order supports girl-child education through Nanhi Kali.
Shop oil refills → Bottle with six reeds from ₹749
Continue the read
More on reeds, refills and repurchasing
- Refill or a new diffuser? — the per-millilitre arithmetic, laid out.
- Do you need new reeds when refilling a SOSA diffuser? — the same question from the reed side.
- The complete stick-replacement guide and changing fragrance in the same bottle.
- Why can't I smell my reed diffuser? — for a full bottle in a quiet room.
- Brand: the SOSA founder story.
Editorial standards & sources
About this guide: Written by Sonal Sahani, ISIPCA Versailles-trained founder and perfumer at SOSA Home & Body, on how often reed diffuser sticks actually need replacing relative to oil refills. Arithmetic flag: the pour counts and per-millilitre figures are simple division on SOSA's listed August 2026 sizes and prices — 300 ÷ 50 = 6 pours, 500 ÷ 50 = 10 pours, 300 ÷ 130 ≈ 2.3, 500 ÷ 130 ≈ 3.8, ₹2,399 ÷ 300ml ≈ ₹8, ₹3,499 ÷ 500ml ≈ ₹7 — not independent measurements. Reed-ageing timelines and the "refresh every few months" guidance are SOSA's own working observations from in-house testing and customer correspondence, not laboratory data; heat, humidity, reed count and composition all move them. Strength ratings are positions on SOSA's internal scale at six reeds, not an industry standard. Prices are subject to change.SOSA reed diffuser range & prices (verified August 2026): alcohol-free, phthalate-free, paraben-free and IFRA-compliant compositions on a heat-stable coconut-derived (CCT) carrier, low-VOC, supplied in a refillable glass bottle with six fibre reeds; 50ml lasts 6–8 weeks and 130ml lasts 14–18 weeks. Morning Freshness (Malabar lemon · peppermint · Nilgiri eucalyptus) 50ml ₹749 · 130ml ₹1,249 · 9.0/10; Garden Bloom (British rose · night-blooming jasmine) 50ml ₹799 · 130ml ₹1,299 · 8.9/10; Evening Calm (Kashmir lavender · chamomile) 50ml ₹799 · 130ml ₹1,299 · 8.9/10; Fresh Brew (Coorg coffee · Kerala vanilla) 50ml ₹849 · 130ml ₹1,349 · 9.5/10; Mountain Breeze (Himalayan pine · sage · Indian cedar) 50ml ₹849 · 130ml ₹1,349 · 9.4/10. Reed diffuser refills are oil only — you reuse your own vessel and reeds: 300ml ₹2,399 (roughly 8–11 months) · 500ml ₹3,499 (roughly 14–18 months), about ₹7–8 per ml against ₹15–17 per ml for a 50ml bottle. Duo sets ₹1,498–₹1,598 for 2 × 50ml and ₹2,498–₹2,598 for 2 × 130ml. Strength figures are positions on SOSA’s own internal strength scale, not an industry standard. Replacement reeds are not sold as a separate SKU; SOSA guidance is to refresh reeds every few months. The reed line is separate from the water-based Hotel Collection for ultrasonic machines (15ml ₹299 · 100ml ₹999 · 300ml ₹1,799) and the two are not interchangeable. Diffusers: Boond 300ml ₹899 · Sukoon 500ml ₹1,899 · Megh 6L ₹3,499 · waterless Vaayu ₹11,999. 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.