★ SOSA reed diffusers · air conditioning
An air-conditioned room is not a bad room for a reed diffuser. The path the vent blows along is a bad place, and those are not the same thing
★ ★ ★ ★ ★
★★★★★
"I assumed the AC was killing my diffuser. It was killing the one I had put on the shelf under the vent — the second bottle across the room is on week seven and fine."
Mountain Breeze 50ml
★★★★★
"Nobody tells you that a sealed AC room actually holds fragrance better once the compressor stops. My bedroom smells best at 6am."
Evening Calm · bedroom
★★★★★
"Two reeds extra through the AC months, back to six in October. That single line of advice was worth the whole article."
Reed count · seasonal
★★★★★
"Cold room, cold bottle, quiet fragrance — and I had been blaming the scent. Morning Freshness cuts through the chill far better."
Moved to Morning Freshness
★★★★★
"My 50ml was finishing in about four weeks in a cabin with the split blowing straight at it. Moved it to the far console and it behaved normally."
Office cabin placement
★★★★★
"Ran the tissue test the founder describes, found the air path, moved the bottle three feet. Same oil, completely different room."
Garden Bloom · placement
★★★★★
"I assumed the AC was killing my diffuser. It was killing the one I had put on the shelf under the vent — the second bottle across the room is on week seven and fine."
Mountain Breeze 50ml
★★★★★
"Nobody tells you that a sealed AC room actually holds fragrance better once the compressor stops. My bedroom smells best at 6am."
Evening Calm · bedroom
★★★★★
"Two reeds extra through the AC months, back to six in October. That single line of advice was worth the whole article."
Reed count · seasonal
★★★★★
"Cold room, cold bottle, quiet fragrance — and I had been blaming the scent. Morning Freshness cuts through the chill far better."
Moved to Morning Freshness
★★★★★
"My 50ml was finishing in about four weeks in a cabin with the split blowing straight at it. Moved it to the far console and it behaved normally."
Office cabin placement
★★★★★
"Ran the tissue test the founder describes, found the air path, moved the bottle three feet. Same oil, completely different room."
Garden Bloom · placement
✓ Six fibre reeds per bottle · alcohol-free, phthalate-free CCT base · handmade in Pune ✓ Tested through 45°C summer heat and 85% monsoon humidity · low-VOC, IFRA-compliant ✓ 50ml lasts 6–8 weeks · 130ml lasts 14–18 weeks · oil refill 300ml ₹2,399
Founder Diaries · Reed Diffusers · Air Conditioning
Effect two — cold, dry air: a cooler room evaporates less. The bottle lasts longer and the room reads quieter. Neither is a fault.
Effect three — the sealed room: shut doors and windows stop the air exchanging with outside, so what the reeds release stays put. This is the one that helps, and why a sealed AC bedroom is often the best-smelling room in an Indian flat.
The net: move the bottle out of the air path, add a reed or two through the cold months, and an AC room becomes one of the easiest rooms a reed diffuser can live in.
Evening Calm₹799 · 8.9/10Fragrance mostly leaves a room by leaving the building. Running an air conditioner means shutting the doors and windows, and a shut room exchanges far less air with the outside than an open one. Everything the reeds release stays in the space and accumulates instead of drifting out of a window. It is why a sealed 120 sq ft bedroom with a split unit is very often the best-smelling room in the house while the naturally ventilated hall next door seems to swallow everything, and it explains the six o'clock effect people describe: strongest in the morning, after hours sealed with nothing opened. Give a sealed room a soft composition and it will carry it perfectly well.
Mountain Breeze · 9.4/10from ₹849Shop → 
Morning Freshness · 9.0/10from ₹749Shop → 
Evening Calm · sealed bedroomsfrom ₹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.
Almost every message I get about air conditioning treats it as one thing that is either good or bad for a reed diffuser. It is not one thing. An air conditioner does three separate things to a room, and they pull in different directions — it aims a fast, narrow stream of air at part of the space, it lowers the temperature and the humidity of all of it, and it obliges you to keep the doors and windows shut. The first two work against you. The third works for you, rather more than people expect. Most "the AC ruined my diffuser" stories are the first effect, happening at one shelf, blamed on the whole machine.
Quick answers — read this first
Effect one — the stream: a bottle sitting in the vent's air path loses reeds and weeks. This is the damaging one, and it is a placement problem, not an AC problem.Effect two — cold, dry air: a cooler room evaporates less. The bottle lasts longer and the room reads quieter. Neither is a fault.
Effect three — the sealed room: shut doors and windows stop the air exchanging with outside, so what the reeds release stays put. This is the one that helps, and why a sealed AC bedroom is often the best-smelling room in an Indian flat.
The net: move the bottle out of the air path, add a reed or two through the cold months, and an AC room becomes one of the easiest rooms a reed diffuser can live in.
The short answer
Short answer: yes, in three different ways rather than one. Directed draught from the vent strips the reeds and empties the bottle weeks early while leaving the room smelling of very little. Lower temperature and humidity slow the whole system, making the room quieter and the bottle longer-lived. And a sealed room holds fragrance far better than an open one. Two effects hurt; one helps.
The mechanism: oil climbs six fibre reeds by capillary action and evaporates off the exposed surface. Fast air over that surface removes vapour faster than the reed can replace it, so you burn oil without filling the room. Cold air does the reverse. Sealing the room stops what does arrive from leaking outside.
Shop: in a cold, sealed room the compositions that hold their shape best are Mountain Breeze at 9.4/10 and Morning Freshness at 9.0/10, from ₹749–₹849 for 50ml. For AC bedrooms, Evening Calm ₹799. Oil refills from ₹2,399. Free shipping above ₹499.
In this guide
Best in a cold room
Mountain Breeze 9.4 · from ₹849
For the sealed AC bedroom
Evening Calm 8.9 · from ₹799
If the vent already cost you weeks
300ml oil refill · ₹2,399
Straight answer
Does air conditioning affect a reed diffuser, and should I stop using one in an AC room?
1. It affects it in three ways, and only one of them is genuinely harmful. The harmful one is the vent's air path. Fast, continuous, directed air over six fibre reeds removes fragrance from the reed faster than the room can be filled by it, so you pay in oil and receive very little scent. That is a placement fault with a free fix.
2. Cold and dry air slows the system rather than damaging it. A room held at 22–24°C evaporates less than the same room at 33°C, so a 50ml will tend towards the long end of its 6–8 week window and the room will read a shade quieter. Nothing has gone wrong; you are seeing the same bottle spread over more days.
3. The sealed room is a real advantage, and nobody mentions it. Fragrance leaves a room mainly by leaving the building, and shut doors and windows stop that. A closed air-conditioned bedroom keeps what the reeds give it in a way a cross-ventilated hall never can.
4. The fix is measured in feet, not rupees. Move the bottle out of the stream — diagonally across the room from a split unit, or well to the side of a window unit — at roughly waist to chest height on a tray, with clear air around it.
5. If the room is cold all day, add reeds rather than changing bottles. Six reeds is the calibrated count; nine takes a 50ml closer to five weeks than eight.
6. Do not buy a 130ml hoping it will beat the air conditioning. It holds more oil and lasts 14–18 weeks rather than 6–8, and at the same six reeds it projects the same. Size buys duration, never reach.
Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
2. Cold and dry air slows the system rather than damaging it. A room held at 22–24°C evaporates less than the same room at 33°C, so a 50ml will tend towards the long end of its 6–8 week window and the room will read a shade quieter. Nothing has gone wrong; you are seeing the same bottle spread over more days.
3. The sealed room is a real advantage, and nobody mentions it. Fragrance leaves a room mainly by leaving the building, and shut doors and windows stop that. A closed air-conditioned bedroom keeps what the reeds give it in a way a cross-ventilated hall never can.
4. The fix is measured in feet, not rupees. Move the bottle out of the stream — diagonally across the room from a split unit, or well to the side of a window unit — at roughly waist to chest height on a tray, with clear air around it.
5. If the room is cold all day, add reeds rather than changing bottles. Six reeds is the calibrated count; nine takes a 50ml closer to five weeks than eight.
6. Do not buy a 130ml hoping it will beat the air conditioning. It holds more oil and lasts 14–18 weeks rather than 6–8, and at the same six reeds it projects the same. Size buys duration, never reach.
Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
TL;DR: the vent's air path hurts, cold dry air slows things down, and the sealed room helps. Move the bottle out of the stream, add a reed or two through the cold months, and leave the bottle size alone. An AC room out of the draught is one of the better homes for a reed diffuser, not a worse one.
Reads clearly in cold air
SOSA Mountain Breeze · pine, sage & Indian cedar ₹849 / 50ml
Cold air flattens sweetness first, which is why gourmand fragrances often feel as though they have disappeared in an air-conditioned study. Mountain Breeze has no sweetness to lose: Himalayan pine over sage and deodar cedar, at 9.4 out of 10 on our own internal scale at six reeds, on a heat-stable phthalate-free CCT base. 130ml ₹1,349 for 14–18 weeks.
Part one — the three effects, separated
Air conditioning gets blamed as a whole because its three effects arrive together and feel like one experience: a cold room where the diffuser seems to be doing nothing and the bottle is going down anyway. Pull them apart and each has a different signature, cost and remedy. Two work against you and one quietly works for you — which is why I never tell anyone to abandon a reed diffuser because their flat is air-conditioned.
1
EFFECT ONE · HURTS · COSTS WEEKS
The directed stream — the only genuinely damaging one
A split unit does not gently stir a room; it throws a fast, narrow, continuous column of air along a particular line, usually across the upper third of the space before it falls and returns. Anything standing in that line is being scoured. Continuous mechanical air over a reed removes vapour faster than capillary action can bring more oil up the fibre, so the exposed end dries out, the fragrance is carried off in a thin plume nobody stands in, and the oil level drops without the room ever filling. You are paying for evaporation and receiving very little scent for it. In our own correspondence a 50ml in a split's direct path routinely comes back as finishing weeks inside its 6–8 week window — treat that as SOSA working guidance rather than a measurement, because it depends entirely on how close and how directly the stream hits.
The tell: oil going down fast and a room that smells of nothing. Fast plus quiet always means draught.
2
EFFECT TWO · HURTS MILDLY · COSTS PRESENCE
Cold, dry air slows the whole system down
Evaporation is temperature-driven. A room held at 22–24°C releases fragrance from a reed more slowly than the same room at 33°C, and an air conditioner also pulls a great deal of moisture out of the air as it works. The result is a bottle that goes down slowly and a room that reads a shade quieter than the same bottle read in April. That is the same total quantity of fragrance spread across more days, which is why AC-room owners so often report both "it's too subtle" and "it's lasting ages" in one sentence. Those are one observation, not two. The remedy is reed count: six is the calibrated number, and eight or nine restores presence in a cold room at a proportional cost in weeks.
The tell: slow bottle and a quiet room that still smells right up close. That is cold, not draught.
3
EFFECT THREE · HELPS
The sealed room keeps what it is given
Evening Calm₹799 · 8.9/10Fragrance mostly leaves a room by leaving the building. Running an air conditioner means shutting the doors and windows, and a shut room exchanges far less air with the outside than an open one. Everything the reeds release stays in the space and accumulates instead of drifting out of a window. It is why a sealed 120 sq ft bedroom with a split unit is very often the best-smelling room in the house while the naturally ventilated hall next door seems to swallow everything, and it explains the six o'clock effect people describe: strongest in the morning, after hours sealed with nothing opened. Give a sealed room a soft composition and it will carry it perfectly well.Part two — the air-conditioning ledger
Here are all three effects set out as a ledger, with what each does to the reeds, what it does to the room, and what it does to a 50ml bottle rated at six to eight weeks with its standard six reeds. Where a figure is a range rather than a number, that is deliberate — these are working observations from our own testing and from customer correspondence, not laboratory measurements, and your ceiling height and unit size move them.
The AC ledger
What each effect costs you, and what it gives back
| What the AC is doing | Effect on the six reeds | Effect on the room | Effect on a 50ml | Verdict |
|---|---|---|---|---|
| Blowing directly across the bottle ★ | Exposed ends dry faster than they can rewet | Thin plume, very little accumulation | Finishes well inside 6–8 weeks | The one real problem — move the bottle |
| Blowing across the room, bottle out of the path | Untouched — reeds work at their own rate | Gentle circulation carries scent about | Normal, often the long end of the window | This is the placement you want |
| Holding the room at 22–24°C | Slower release from the same surface | Quieter, softer, more even | Stretches towards 8 weeks and beyond | Not a fault — add reeds if you want more |
| Pulling humidity out of the air | Fibre unaffected; no clogging as rattan would | Notes read sharper and drier | Marginal change at most | Neutral to mildly positive |
| Doors and windows shut, unit cycling or off | No change at the reed | Fragrance accumulates instead of escaping | No change | The hidden advantage of an AC room |
| The honest caveat: these are SOSA's own working figures from in-house testing and customer correspondence, not laboratory data. A tower unit in a 90 sq ft cabin and a five-star ducted system in an open-plan flat are different problems, and the only reliable way to know which effect you are living with is the tissue survey described in our AC placement guide. Strength ratings quoted anywhere on this page are positions on SOSA's internal scale at six reeds, not an industry standard and not a concentration. | ||||
Shop this guide
What works in a cold, sealed room
Mountain Breeze · 9.4/10from ₹849Shop → Morning Freshness · 9.0/10from ₹749Shop → Evening Calm · sealed bedroomsfrom ₹799Shop →
The SOSA principle
Air conditioning is not one influence on a diffuser. It is a draught, a temperature and a seal, and they do not agree with each other.
Judge the draught by where the bottle sits, the temperature by how fast the level falls, and the seal by how the room smells first thing in the morning. Three different observations, three different answers.
Part three — living with the on/off cycle
An air conditioner is not a constant condition; it is a schedule. In most Indian homes the bedroom unit runs from about eleven at night until six or seven in the morning, and the living-room unit runs in bursts through the evening. The diffuser in each room is living two different lives a day, and people almost always judge it in the wrong half of the cycle. You walk into a bedroom at nine in the evening — warm, unsealed, doors open, nothing accumulated for hours — and conclude the bottle is finished. The same room at six in the morning is frequently the strongest-smelling space in the flat. The fair test is at the end of a closed period, not the beginning.
The cycle also changes what a good placement looks like. With the compressor running you want the bottle out of the stream but still inside the room's circulation: the far side of the space, across a diagonal from the unit, on a console rather than a high shelf near the ceiling where the cold jet travels. With the unit off, the room becomes still air, and stillness is the other failure mode — nothing carries the fragrance from the glass to the doorway. The placement that survives both halves is one where people walk past a few times an hour — a chest of drawers on the route to the bathroom, a sideboard by the bedroom door. Intermittent human traffic distributes; continuous mechanical air strips. That distinction is the whole of airflow, and it is why the answer to "does AC hurt?" is always "which part of it, and where is your bottle?"
One habit worth changing: many people set the unit to swing. A swinging louvre turns a fixed stream into one that sweeps a wider arc, and it will find a bottle you thought was safely out of the way. Fixing the louvre to blow away from the diffuser is free and settles the question. And if your room is genuinely large — past roughly 250–300 sq ft of connected open volume — no placement will make a passive point source fill it, air-conditioned or not. That is the format's honest ceiling, and a Sukoon at ₹1,899, covering 270–320 sq ft with timers, is the correct answer rather than a third bottle.
A sealed room is a gift to a reed diffuser. The vent pointing at it is not.
— Sonal Sahani, SOSA
Part four — what to change, in order
Everything above as a sequence of decisions, cheapest first. The first three cost nothing at all, and in my experience they settle three-quarters of the AC complaints that reach us.
The air-conditioned room edit
Six moves, in the order I would make them
| Move | Which of the three effects it addresses | What it costs | Price |
|---|---|---|---|
| 1. Take the bottle out of the vent's air path ★ | The directed stream — the only harmful one | Nothing, and it usually adds weeks back | Free |
| 2. Stand it waist to chest height on a tray, a few feet clear | Stream and stillness together | Nothing — the tray also protects the wood | Free |
| 3. Flip all six reeds weekly, gloves on | Restores the designed rate in any conditions | Nothing | Free |
| 4. Add two to three reeds for the cold months | Cold, slow release — restores presence | Proportional bottle life: nine reeds ≈ 5 weeks on a 50ml | Free |
| 5. Move to a drier, higher-projecting composition | Cold flattening sweetness | A new bottle and a change of character | ₹849 · ₹749 |
| 6. 300ml oil refill | Makes running eight or nine reeds affordable | Nothing — oil only, you reuse your vessel and reeds | ₹2,399 · 8–11 months |
| Not a fix: a 130ml bottle | None of them — it changes duration only | Said plainly rather than sold as an upgrade | From ₹1,249 |
Honest notes for buyers: the week figures on this page are SOSA's own working guidance from in-house testing and customer correspondence, not laboratory measurements; results vary with room volume, ceiling height, unit size and season. Strength ratings are positions on SOSA's internal scale at six reeds, not an industry standard. The refills are oil only — you reuse your own glass vessel and your own reeds — and replacement reeds are not sold separately, which is an honest gap in our range; our guidance is to refresh reeds every few months. Reed oil never goes in a Sukoon or Boond, and the water-based Hotel Collection never goes in a reed bottle. Keep both away from children and pets, out of direct sunlight, and stand the bottle on a tray — the oil marks wood and stone. Handmade in small batches in Pune; a portion of every order supports girl-child education through Nanhi Kali.
If a vent has already cost you a bottle
SOSA reed diffuser refill · oil only ₹2,399 / 300ml
A bottle emptied early by a draught is not a wasted vessel — the glass and reeds are fine, only the oil has gone. The refill is oil alone at roughly ₹7–8 per millilitre against ₹15–17 for a fresh 50ml bottle, up to about 55% less. A 300ml keeps a vessel running roughly 8–11 months; the 500ml at ₹3,499 runs 14–18 months. Remove the reeds, pour to the neck, return them and flip once so both ends are coated.
SS
ISIPCA
Versailles
Versailles
A note from Sonal
When we were testing this range through a Pune summer, the room that behaved worst was not the hottest one. It was a small sealed cabin with the split blowing straight along the shelf where we had put the bottle. The oil went down faster than anywhere else in the building and the room smelled of almost nothing, which is the exact combination that makes people write to us convinced they have been sold a weak product.
We moved the same bottle to the opposite wall, four or five feet out of the stream, and left everything else identical. The level slowed and the room filled. Nothing about the fragrance had changed. That is the lesson of this page: an air conditioner seals a room and also aims a jet through it, and a reed diffuser cares enormously about the jet while rather liking the seal.
I would rather you moved a bottle three feet than bought a second one. If, after all of it, your living-dining is simply too large for a passive point source, buy a machine — that is a limit I would rather name than sell around. Everything is composed and handmade in small batches in Pune, and a part of every order funds a girl's classroom through Nanhi Kali.
Frequently asked questions
Does air conditioning make a reed diffuser evaporate faster or slower?
Both, depending on where the bottle is. In the vent's air path, faster — often finishing well inside the 6–8 week window for a 50ml. Out of the path, slower, because the room is cooler than it would otherwise be. Level dropping quickly and a room that smells of little is the draught. Dropping slowly, quiet room, reeds smelling right up close, is the cold.
Is a sealed air-conditioned room bad for fragrance?
The opposite. Fragrance mostly escapes by leaving the building, and a sealed room stops that, so what the reeds release accumulates. The catch is that a sealed room with no movement can go stagnant near the bottle, so keep it somewhere people walk past rather than in an alcove.
Should I add more reeds in an air-conditioned room?
Often, yes — two or three extra through the cold months is the neatest correction for a cool room reading quiet, free and reversible in ten seconds. Six fibre reeds is the count each SOSA composition is dosed for; nine takes a 50ml closer to five weeks than eight. It will not rescue a bottle sitting in the stream, though. Move it first, then count reeds.
How far from the AC should a reed diffuser be?
Far enough to be out of the air path, which is a direction rather than a distance. A split throws air along a line before it falls and returns; three feet below the unit can be safer than twelve feet directly in front of it. Work the path out with a strip of tissue, then place the bottle diagonally out of it, waist to chest height.
Does the dryness of AC air affect the reeds themselves?
Very little, and this is one place fibre reeds have an advantage. Rattan's natural pores clog in humid air and behave inconsistently as humidity swings; fibre wicks steadily through both an 85% monsoon and a dehumidified December room. Dryness changes how the notes read more than how much oil moves up the stick.
Reed diffusers & air conditioning · 2027
Keep the seal. Lose the stream. Then judge the bottle at the end of a closed night, not the start of one
Mountain Breeze at 9.4/10 and Morning Freshness at 9.0/10 read clearly in cold air, from ₹749–₹849 for 50ml (6–8 weeks) and ₹1,249–₹1,349 for 130ml (14–18 weeks), six fibre reeds in every bottle. Evening Calm ₹799 for sealed bedrooms. Oil-only refills from ₹2,399. Free shipping above ₹499.
Shop Mountain Breeze → Evening Calm ₹799
Continue the read
More on airflow and placement
- Where to place a diffuser in an air-conditioned room — the tissue survey, step by step.
- Should you put one near an AC vent? — what the stream actually costs, in weeks.
- Does airflow make it stronger or finish faster? — intermittent versus continuous, the central idea.
- The complete airflow and placement guide — this page and the eight around it in one place, plus why can't I smell my reed diffuser?
- 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 three separate effects air conditioning has on a reed diffuser and which of them is worth acting on. The temperature, draught and bottle-life figures here — including any statement about how many weeks a bottle loses in a vent's air path — are SOSA's own working guidance from in-house testing and customer correspondence, not laboratory measurements; real results vary with room volume, ceiling height, unit size, ventilation and season. Strength ratings are positions on SOSA's internal scale at six reeds, not an industry standard.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.