★ SOSA reed diffusers · presence
Fresh Brew measures 9.5 and reads warmer than louder; Morning Freshness measures 9.0 and cuts through a humid room. Both facts are true
★ ★ ★ ★ ★
★★★★★
"Morning Freshness is rated lower than Fresh Brew and in my Mumbai flat in July it is unmistakably the one you notice."
Morning Freshness 130ml
★★★★★
"Fresh Brew does not shout. It makes the whole living room feel like a different room, which is not the same thing."
Fresh Brew 130ml
★★★★★
"I stopped buying by the number and started buying by what my rooms are like. Completely different result."
Bought by room, not rating
★★★★★
"Mountain Breeze in a cold air-conditioned study reads far bigger than 9.4 suggests. Dry air suits it."
Mountain Breeze 50ml
★★★★★
"Guests notice Garden Bloom at the door every single time and I have stopped noticing it entirely. Apparently that is normal."
Garden Bloom 50ml
★★★★★
"Honest of them to say there is no oud and no aquatic instead of pushing me towards the nearest thing."
Fresh & Grounded duo
★★★★★
"Morning Freshness is rated lower than Fresh Brew and in my Mumbai flat in July it is unmistakably the one you notice."
Morning Freshness 130ml
★★★★★
"Fresh Brew does not shout. It makes the whole living room feel like a different room, which is not the same thing."
Fresh Brew 130ml
★★★★★
"I stopped buying by the number and started buying by what my rooms are like. Completely different result."
Bought by room, not rating
★★★★★
"Mountain Breeze in a cold air-conditioned study reads far bigger than 9.4 suggests. Dry air suits it."
Mountain Breeze 50ml
★★★★★
"Guests notice Garden Bloom at the door every single time and I have stopped noticing it entirely. Apparently that is normal."
Garden Bloom 50ml
★★★★★
"Honest of them to say there is no oud and no aquatic instead of pushing me towards the nearest thing."
Fresh & Grounded duo
✓ Six fibre reeds per bottle · alcohol-free, phthalate-free CCT base · handmade in Pune ✓ Strength ratings are positions on SOSA’s own internal scale at six reeds ✓ No oud, no musk-forward scent and no aquatic in the reed range — stated plainly
Founder Diaries · Reed Diffusers · Presence
Most noticeable in a humid room: Morning Freshness. Cold, sharp notes — Malabar lemon, peppermint, Nilgiri eucalyptus — cut through warm damp air that softens everything else.
Most noticeable to a guest arriving: Fresh Brew and Garden Bloom, because a warm or floral accord registers immediately on entering a home.
The number is not a quality ranking. It is a position on SOSA's own internal scale at six reeds — not an industry standard, not a concentration. Evening Calm at 8.9 is quiet by design.
Mountain Breeze₹849 · 9.4/10A smell is noticeable to the extent that it differs from the air already around you, and Indian air is very often warm and humid. Warm humid air is itself soft, rounded and slightly sweet-smelling; a warm, rounded composition released into it merges with the background, so the room feels pleasant without feeling scented. Cold, angular materials do the opposite — the citrus, mint and eucalyptus in Morning Freshness read as a sharp edge against that background and keep announcing themselves. This is why a 9.0 can be the most noticeable bottle in a monsoon flat while a 9.5 is the most noticeable one in a dry, cool December sitting room. Neither bottle changed. The air did.
Fresh Brew · 9.5 measuredfrom ₹849Shop → Morning Freshness · humid airfrom ₹749Shop → 
Garden Bloom · on arrivalfrom ₹799Shop →
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.
We publish a strength number for every reed composition, and I want to explain what it does not tell you. The number is projection measured on our own scale at six reeds; presence is what a particular person notices in a particular room on a particular day — and the two come apart more often than the tidy ranking suggests. Fresh Brew measures highest at 9.5 and reads warmer rather than louder. Morning Freshness measures 9.0 and can be the most noticeable thing in a humid flat in July. Both of those are true at once, and knowing why is how you buy well.
Quick answers — read this first
Highest measured: Fresh Brew 9.5, then Mountain Breeze 9.4, Morning Freshness 9.0, then Garden Bloom and Evening Calm at 8.9.Most noticeable in a humid room: Morning Freshness. Cold, sharp notes — Malabar lemon, peppermint, Nilgiri eucalyptus — cut through warm damp air that softens everything else.
Most noticeable to a guest arriving: Fresh Brew and Garden Bloom, because a warm or floral accord registers immediately on entering a home.
The number is not a quality ranking. It is a position on SOSA's own internal scale at six reeds — not an industry standard, not a concentration. Evening Calm at 8.9 is quiet by design.
The short answer
Short answer: for raw measured presence, Fresh Brew at 9.5 and Mountain Breeze at 9.4 lead the range, both ₹849 for 50ml. But in a warm, humid Indian room — a monsoon flat, a bathroom, a coastal city in summer — Morning Freshness at 9.0 and ₹749 often reads as the most noticeable of the five, because sharp cold notes stand out against damp air while warm ones merge into it.
The mechanism: your nose reports contrast, not concentration. A fragrance is noticeable to the degree that it differs from the air already in the room, and it fades from awareness as you adapt to it. Warm, rounded accords blend into a warm room and adapt fast; cold, angular ones keep re-registering. That is why a lower-rated composition can be the one everybody comments on.
Shop: pick by your air rather than by the number. Humid or coastal, Morning Freshness ₹749. Dry or air-conditioned, Mountain Breeze ₹849. Hosting and entrances, Fresh Brew ₹849 or Garden Bloom ₹799. Free shipping above ₹499.
In this guide
Highest measured
Fresh Brew 9.5 · from ₹849
Loudest in humid air
Morning Freshness 9.0 · from ₹749
Loudest in dry, cooled air
Mountain Breeze 9.4 · from ₹849
Straight answer
Which SOSA reed diffuser will I actually notice most?
1. By the number, it is Fresh Brew at 9.5. Coorg coffee over Kerala vanilla, the fullest projection we make at six reeds, ₹849 for 50ml and ₹1,349 for 130ml. It reads as warmth filling a room rather than as loudness, which is why some people expect more announcement than they get.
2. In a humid room, it is very often Morning Freshness at 9.0. Malabar lemon, peppermint and Nilgiri eucalyptus are cold and angular, and cold angular notes cut through warm damp air that rounds everything else off. At ₹749 it is also the least expensive bottle in the range.
3. In dry or air-conditioned air, Mountain Breeze at 9.4 gains. Himalayan pine, sage and Indian cedar are dry to begin with; in cooled, low-humidity air they hold their edges and read bigger than the number suggests.
4. To a person walking in, Garden Bloom punches above 8.9. A rounded floral registers on arrival more reliably than almost anything, which is why it belongs at an entrance even though two other bottles measure higher.
5. Evening Calm at 8.9 is the softest and is meant to be. Kashmir lavender and chamomile are composed to help a room settle. Putting it in a living room and concluding reed diffusers are weak is the commonest mismatch we see.
6. Whatever you choose, your own nose will stop reporting it. Adaptation to a constant happens within minutes and is strongest at home. Judge presence in the first three seconds of coming in from outside, or ask a guest.
Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
2. In a humid room, it is very often Morning Freshness at 9.0. Malabar lemon, peppermint and Nilgiri eucalyptus are cold and angular, and cold angular notes cut through warm damp air that rounds everything else off. At ₹749 it is also the least expensive bottle in the range.
3. In dry or air-conditioned air, Mountain Breeze at 9.4 gains. Himalayan pine, sage and Indian cedar are dry to begin with; in cooled, low-humidity air they hold their edges and read bigger than the number suggests.
4. To a person walking in, Garden Bloom punches above 8.9. A rounded floral registers on arrival more reliably than almost anything, which is why it belongs at an entrance even though two other bottles measure higher.
5. Evening Calm at 8.9 is the softest and is meant to be. Kashmir lavender and chamomile are composed to help a room settle. Putting it in a living room and concluding reed diffusers are weak is the commonest mismatch we see.
6. Whatever you choose, your own nose will stop reporting it. Adaptation to a constant happens within minutes and is strongest at home. Judge presence in the first three seconds of coming in from outside, or ask a guest.
Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
TL;DR: Fresh Brew 9.5 and Mountain Breeze 9.4 measure highest; Morning Freshness at 9.0 reads loudest in humid air; Garden Bloom at 8.9 registers hardest on arrival; Evening Calm at 8.9 is deliberately the quietest. Buy for your air, not for the number.
The one that reads louder than it measures
SOSA Morning Freshness · Malabar lemon, peppermint & Nilgiri eucalyptus ₹749 / 50ml
9.0 on our internal strength scale at six reeds, which places it third of five — and in a Mumbai July or a Chennai August it is frequently the composition people notice most. Cold, sharp materials keep their edges against warm damp air, where rounder accords soften and merge into the room. Bathrooms, kitchens and home offices are its natural rooms. Alcohol-free, phthalate-free, on a heat-stable CCT base tested through 85% monsoon humidity. 130ml ₹1,249 for 14–18 weeks.
Part one — two different measurements wearing the same word
When a customer asks which fragrance is strongest, they are usually asking one of two questions without realising they are different. The first is about the bottle: how much fragrance does this composition put into a room per hour compared with the others. The second is about them: which one will I keep noticing. The first is a property of the oil and is stable; the second is a property of the encounter between that oil, the air in your home and your own nose, and it changes with the weather. Our published number answers the first question only. This article is mostly about the second.
1
MEASURED
What the SOSA number actually is
Every reed composition carries a figure — 9.5, 9.4, 9.0, 8.9, 8.9 — and it describes projection in an ordinary Indian room at six fibre reeds, judged in-house. It is our own internal scale, not an industry standard, not a concentration figure and not a quality ranking. A 9.5 is not a better fragrance than an 8.9; it is a louder one, and louder is not always what a room wants. The number also assumes the standard six reeds, because reed count is the real volume control: the same oil at nine reeds is a different experience from the same oil at four, and no published rating can survive you changing the count. Read it as a starting position rather than a verdict.
What it is good for: comparing our five compositions with each other, in the same room, at the same six reeds. Nothing beyond that.
2
PERCEIVED
Contrast, not concentration — why cold notes cut through
Mountain Breeze₹849 · 9.4/10A smell is noticeable to the extent that it differs from the air already around you, and Indian air is very often warm and humid. Warm humid air is itself soft, rounded and slightly sweet-smelling; a warm, rounded composition released into it merges with the background, so the room feels pleasant without feeling scented. Cold, angular materials do the opposite — the citrus, mint and eucalyptus in Morning Freshness read as a sharp edge against that background and keep announcing themselves. This is why a 9.0 can be the most noticeable bottle in a monsoon flat while a 9.5 is the most noticeable one in a dry, cool December sitting room. Neither bottle changed. The air did.
The practical version: humid room, choose cold and sharp. Dry or air-conditioned room, warm and woody compositions hold their shape and gain.
3
ADAPTATION
Some accords fade from your awareness faster than others
Olfactory adaptation is the commonest reason people believe a diffuser has stopped working: your nose stops reporting a constant within minutes and adapts hardest at home, where the smell is part of a background you have learned to ignore. What is less widely known is that it does not happen at the same rate for everything. A smooth, warm, continuous accord is easy to stop noticing; a bright or slightly cool one tends to re-register, particularly when you move between rooms or when the temperature changes. So Fresh Brew is often described as making a room feel warmer rather than as smelling strong — you notice it on arrival and then it becomes the character of the room, which is exactly what a 9.5 should do and not at all what people expect a 9.5 to do. Guests are the better witnesses in every case, because they have not adapted to anything.
Part two — measured against perceived, scent by scent
Here are all five compositions with their measured position and how each behaves in the room, including where each one over-performs its rating and where it under-performs it. The measured column is our internal scale at six reeds; everything else in the table is observation from in-house testing and several years of customer correspondence rather than instrumentation.
The presence table
What each number does and does not predict
| Composition | Measured at six reeds | Character of its presence | Over-performs its rating in | Under-performs its rating in |
|---|---|---|---|---|
| Fresh Brew ★ | 9.5 · warm-deep | Fills and warms — you notice it arriving, then it becomes the room | Cool dry evenings, hosting, entrances, open living-dining | Hot humid afternoons, where it merges with the air |
| Mountain Breeze | 9.4 · deep woody | Dry and grounding — presence without any sweetness at all | Air-conditioned studies, libraries, low-humidity winters | Very damp monsoon rooms, where dry woods lose their edge |
| Morning Freshness | 9.0 · bright | Sharp and clear — the one that keeps re-registering | Humid flats, bathrooms, kitchens, coastal cities in summer | Cold dry rooms, where it can read thin rather than bright |
| Garden Bloom | 8.9 · floral | Rounded and hotel-like — strongest at the moment of arrival | Entryways and hallways, where people encounter it fresh | Rooms you sit in all day — adaptation catches up quickly |
| Evening Calm | 8.9 · softest | Deliberately quiet — a room that settles rather than announces | Bedrooms, nurseries and reading corners, close to you | Living rooms and any large space — it is not built for them |
| The honest caveat: none of this survives a bad set-up. A 9.5 in a closed cabinet loses to an 8.9 on an open console, every time, and an unflipped bottle at week six loses to anything. Get the free things right — flip all six reeds weekly, stand it in gently moving air at waist-to-chest height, out of sun and draught — before you read anything into these differences. And two honest gaps while we are being precise: the reed range has no oud, no musk-forward composition and no aquatic. If that is the presence you are after, none of these five is it. | ||||
Shop this guide
The three that read loudest, for three different reasons
Fresh Brew · 9.5 measuredfrom ₹849Shop → Morning Freshness · humid airfrom ₹749Shop → Garden Bloom · on arrivalfrom ₹799Shop →
The SOSA principle
You do not smell a fragrance. You smell the difference between the fragrance and the air it is in.
Which is why the same bottle is remarkable in June and unremarkable in January, and why the highest number in the range is not automatically the one you will notice most.
Part three — your air decides which reading wins
Three properties of a room do most of the work here. The first is humidity. In a coastal or monsoon-season flat at something near 85 per cent relative humidity, the air is already heavy and slightly sweet, and warm compositions lose contrast against it while cold ones gain. In a dry Delhi January the reverse holds: woods and roasted notes keep their architecture and read generously, while a citrus-mint accord can seem thin. This single variable moves the perceived ranking of our five compositions more than anything else, and it moves twice a year in most of India. There is no fault in a bottle that seemed enormous in July and modest in December; it is the same oil meeting different air.
The second is temperature, which acts on both sides at once. Warmth thins the oil and raises the rate at which fragrance leaves the reeds, so a hot room genuinely receives more — while also being the room in which warm accords blend away. That is the paradox behind a very common message: my diffuser is emptying faster in summer and I can smell it less. Both halves are usually true, and the answer is not a bigger bottle. The third is the background. A kitchen carries the memory of a morning's cooking; a bathroom carries damp; a home with agarbatti or a mosquito coil has a strong incumbent smell. A composition has to differ from whatever is already there, which is why Morning Freshness works so well in exactly those rooms, and why nothing works over live cooking. Run the extractor, open a window for ten minutes, close up, and give it half an hour before you judge anything.
Which leaves the question of how to test presence honestly, since your own nose in your own room is the least reliable instrument available. Use the doorway: go out for fifteen minutes, come back in, and pay attention only to the first three seconds. That reading, before adaptation resets, is close to what a visitor experiences. Better still, let a visitor tell you unprompted. If guests comment and you cannot smell it, the diffuser is working and you have simply adapted — that is the single most common misdiagnosis in this category, and no purchase fixes it because nothing is broken. If nobody comments either, then read the table above, check the free levers, and consider whether you have the right composition for your air rather than the highest number in the range.
The strongest fragrance in a room is not the loudest one. It is the one least like the air already there.
— Sonal Sahani, SOSA
Part four — choosing by the room you actually have
Rather than ranking the five in the abstract, here is the choice arranged by the condition you are buying into. Prices are for the 50ml; every composition is also made in 130ml, which buys 14–18 weeks against 6–8 rather than any extra presence.
The presence edit
Your air, your room, and the composition that wins there
| If your room is | Choose | Measured | Why it wins there | 50ml / 130ml |
|---|---|---|---|---|
| Humid, coastal, or in monsoon season ★ | Morning Freshness | 9.0 | Cold, sharp notes hold their edge against warm damp air | ₹749 / ₹1,249 |
| Air-conditioned, dry, or a north Indian winter | Mountain Breeze | 9.4 | Dry woods keep their structure in low humidity and read bigger | ₹849 / ₹1,349 |
| A living room you host in | Fresh Brew | 9.5 | The fullest projection we make, and it warms a whole room | ₹849 / ₹1,349 |
| An entrance or hallway people arrive into | Garden Bloom | 8.9 | A rounded floral registers hardest at the moment of arrival | ₹799 / ₹1,299 |
| A bedroom, nursery or reading corner | Evening Calm | 8.9 | Composed to be the quietest thing we make, and close to you all night | ₹799 / ₹1,299 |
| Two connected rooms with different air | Fresh & Grounded duo | 9.0 + 9.4 | They meet on green eucalyptus, so the junction has no seam | ₹1,548 / ₹2,548 |
| Wanting oud, musk or an aquatic | Nothing in our reed range | — | An honest gap; we would rather say so than push the nearest thing | — |
Honest notes for buyers: every strength figure on this page is a position on SOSA's own internal scale at six fibre reeds — not an industry standard, not a concentration, and not a quality ranking. Perceived presence varies with humidity, temperature, room volume, background odour and how long you have been in the room, which is why the table above is guidance rather than a promise. A larger bottle does not raise presence: 130ml lasts 14–18 weeks against 6–8 and projects the same at six reeds. Our refills are oil only, ₹2,399 for 300ml and ₹3,499 for 500ml — you reuse your own vessel and reeds, which we suggest refreshing every few months; reeds are not sold separately. Reed oil never goes into a Sukoon, Boond or Megh, and the water-based Hotel Collection never goes into a reed bottle. Stand every bottle on a tray, flip with gloves, and keep away from children and pets. Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
The highest number in the range
SOSA Fresh Brew · Coorg coffee & Kerala vanilla ₹849 / 50ml
9.5 at six reeds, the fullest projection we make, and worth understanding before you buy it: it does not announce itself so much as change the temperature of a room. People notice it walking in, then stop noticing it and describe the space as cosy. That is a warm-deep composition doing its job. Living rooms, kitchens and offices are its rooms; a cool dry evening is when it is most obviously the strongest thing on this page. 130ml ₹1,349 for 14–18 weeks.
SS
ISIPCA
Versailles
Versailles
A note from Sonal
Publishing a strength number was an argument inside the business. The case against it is that it flattens something genuinely complicated into a decimal, and that people will buy the highest one and be disappointed when it does not shout. The case for it, which won, is that "strong" is otherwise unreadable from a note list, and an Indian customer buying online deserves better than a page of adjectives.
So the number exists, and this page is the caveat that should always travel with it. It is our own scale, at six reeds, comparing our own five compositions. It says nothing about how your July will smell in Kochi or your December in Amritsar. If you want one sentence to buy by: pick the composition least like the air you already live in.
And where we have nothing for you, I would rather say so. There is no oud in this range, no musk-forward composition and nothing aquatic. Those are real gaps, not oversights, and stretching Fresh Brew to stand in for oud would help nobody. Everything is composed and handmade in small batches in Pune, tested through 45°C heat and 85% humidity, and a part of every order funds a girl's classroom through Nanhi Kali.
Frequently asked questions
Which SOSA reed diffuser has the most noticeable presence?
By measured strength, Fresh Brew at 9.5 and Mountain Breeze at 9.4, both ₹849 for 50ml. In practice, in a humid Indian room, Morning Freshness at 9.0 and ₹749 is often the one people notice most, because cold sharp notes cut through warm damp air.
What does the SOSA strength number mean?
It is a position on our own internal scale describing projection in an ordinary Indian room at six fibre reeds. It is not an industry standard, not a concentration and not a quality ranking — Evening Calm sits at 8.9 because it is a sleep fragrance and is meant to be quiet.
Why does my diffuser seem stronger in some months than others?
Because presence is contrast with the surrounding air, and Indian air changes dramatically by season. Warm compositions merge into humid summer air and stand out in dry winter air; cold, sharp ones do the opposite. Heat also raises the evaporation rate, so a bottle can genuinely release more in summer while reading as less noticeable.
Everyone else can smell it and I cannot. Is something wrong?
No — that is olfactory adaptation, and it is the commonest misdiagnosis in the category. Your nose stops reporting a constant within minutes and adapts hardest at home. Judge it in the first three seconds of coming in from outside, or take guests' comments as the measurement. Nothing needs buying.
Do you make an oud or an aquatic reed diffuser?
No. The reed range has no oud, no musk-forward composition and no aquatic — five scents, and those are genuine gaps rather than things we will stretch another bottle to cover. If a deep resinous presence is what you want, Mountain Breeze at 9.4 is the closest in character, and it is a dry woody rather than an oud.
Reed diffuser presence · 2027
Buy for the air you live in — not for the highest number on the page
Fresh Brew at 9.5/10 and Mountain Breeze at 9.4/10 from ₹849, Morning Freshness at 9.0/10 from ₹749, Garden Bloom and Evening Calm at 8.9/10 from ₹799. Six fibre reeds per bottle; 50ml lasts 6–8 weeks and 130ml 14–18. Free shipping above ₹499, and a portion of every order supports girl-child education through Nanhi Kali.
Shop by strength → Morning Freshness ₹749
Continue the read
More on strength and presence
- The four currencies of strength — what each way of getting louder actually costs.
- Throw is a property of the room and the best placement for it.
- Does adding reeds make it stronger? — the number assumes six.
- The complete guide to stronger performance and the full strength guide.
- 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 the difference between measured strength and perceived presence across the five SOSA reed compositions. Strength figures are positions on SOSA's own internal scale at six fibre reeds — not an industry standard, not a concentration and not a quality ranking. Observations about how each composition behaves in humid, dry and air-conditioned rooms come from in-house testing and customer correspondence in Indian homes rather than instrumentation, and vary with room volume, ventilation, background odour and season.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.