★ SOSA reed diffusers · flipping patterns
Flipping all six reeds at once gives you a step; flipping three and three gives you a slope. Both are correct — for different rooms
★ ★ ★ ★ ★
★★★★★
"Three reeds on Sunday and three on Wednesday. The Monday jolt I used to dislike simply stopped happening."
Evening Calm 50ml · staggered
★★★★★
"My bedroom is small and a full flip was genuinely too much for the first evening. Half at a time fixed it without spending anything."
Evening Calm · small room
★★★★★
"I had been flipping two reeds at a time on a bottle that had properly stalled. All six, and it came back within an afternoon."
Mountain Breeze 130ml
★★★★★
"Splitting the flip made the whole eight weeks feel like one steady level rather than a series of peaks and troughs."
Fresh Brew 50ml
★★★★★
"I stagger through an ordinary week and flip all six before people come over. Two settings, no extra spend."
Garden Bloom · hosting
★★★★★
"Marking three of the reeds with a dot of nail varnish sounds silly and it is the only reason I never lose track of which half is due."
Day & Night duo
★★★★★
"Three reeds on Sunday and three on Wednesday. The Monday jolt I used to dislike simply stopped happening."
Evening Calm 50ml · staggered
★★★★★
"My bedroom is small and a full flip was genuinely too much for the first evening. Half at a time fixed it without spending anything."
Evening Calm · small room
★★★★★
"I had been flipping two reeds at a time on a bottle that had properly stalled. All six, and it came back within an afternoon."
Mountain Breeze 130ml
★★★★★
"Splitting the flip made the whole eight weeks feel like one steady level rather than a series of peaks and troughs."
Fresh Brew 50ml
★★★★★
"I stagger through an ordinary week and flip all six before people come over. Two settings, no extra spend."
Garden Bloom · hosting
★★★★★
"Marking three of the reeds with a dot of nail varnish sounds silly and it is the only reason I never lose track of which half is due."
Day & Night duo
✓ Six fibre reeds per bottle · alcohol-free, phthalate-free CCT base · handmade in Pune ✓ 50ml lasts 6–8 weeks · 130ml lasts 14–18 weeks · oil refill 300ml ₹2,399 ✓ Flip weekly with gloves · stand the bottle on a tray · keep out of direct sunlight
Founder Diaries · Reed Diffusers · Flipping
The alternative: staggered flipping — three reeds on Sunday, the other three on Wednesday, then swap. Same total number of flips, no extra cost, and the post-flip surge arrives as a gentle rise rather than a jump.
Who should stagger: anyone who finds the first evening after a flip too loud — small bedrooms, nurseries, sensitive noses, Evening Calm in a closed room.
Who should not: anyone whose bottle has stalled, and anyone with guests arriving. A partial flip is a partial repair.
Garden Bloom₹799 · 8.9/10Split the six into two fixed groups of three and turn one group every three or four days. Each individual reed is still flipped once every seven days, so the total wicking work is unchanged and so, near enough, is the life of the bottle. What changes is the profile: while one group is climbing, the other is settling, and the room reads as one continuous level rather than a weekly announcement. This is the pattern I recommend for a small closed bedroom, a nursery, a reading corner, and for anyone who has told me a fragrance is lovely on most days but overwhelming on Sundays. It costs nothing and it is entirely reversible; if you dislike it, you are one full flip away from the default.
Evening Calm · 8.9/10from ₹799Shop → 
Garden Bloom · 8.9/10from ₹799Shop → 
Day & Night duo₹1,498 / 2×50mlShop →
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 set of instructions in this category tells you to flip the reeds and stops there, as though six reeds were one object. They are not. You have six independent wicks and you can turn any number of them on any day, and the pattern you choose changes the shape of what the room does over a week. Flip all six together and you get a step. Flip three now and three in a few days and you get a slope. Neither is more correct in the abstract; they suit different rooms and different noses.
Quick answers — read this first
The default: flip all six reeds, end for end, once a week. That is the pattern every SOSA composition is dosed around and the one to use if you are not sure.The alternative: staggered flipping — three reeds on Sunday, the other three on Wednesday, then swap. Same total number of flips, no extra cost, and the post-flip surge arrives as a gentle rise rather than a jump.
Who should stagger: anyone who finds the first evening after a flip too loud — small bedrooms, nurseries, sensitive noses, Evening Calm in a closed room.
Who should not: anyone whose bottle has stalled, and anyone with guests arriving. A partial flip is a partial repair.
The short answer
Short answer: flip all six if the room has gone quiet, and flip three at a time if the room is fine and you simply dislike the surge. Turning every reed at once renews every wicking surface at the same moment, so the whole bottle steps up together and then settles over two or three days. Turning half of them staggers those settling curves against each other, and the sum of two offset curves is flatter than either one alone.
The mechanism: a reed that has been standing for a week carries the heavier, slower part of the composition at its exposed end. Inverting it puts a fresher surface into the air and the saturated end back into the oil. Do that to six reeds and six surfaces change together; do it to three and the untouched three hold the old, lower level underneath while the new three rise — which is exactly what smoothing means.
Shop: staggering earns its keep on the quieter compositions in a closed room — Evening Calm and Garden Bloom at ₹799 for 50ml, ₹1,299 for 130ml. The Day & Night duo is ₹1,498 for two 50ml. Free shipping above ₹499.
In this guide
Best staggered, in a bedroom
Evening Calm 8.9 · from ₹799
Best staggered, in an entryway
Garden Bloom 8.9 · from ₹799
Whatever pattern you settle on
300ml oil refill · ₹2,399
Straight answer
Should I flip all the reeds at once, or only some of them?
1. All six is the default, and it is the default for a reason. Every composition in the range is dosed to sit correctly with six fibre reeds turned end for end once a week. If you have no particular complaint about the pattern, do not invent one — flip all six, gloves on, and get on with your Sunday.
2. Flip only some when your objection is to the surge, not to the level. The first evening after a full flip is the loudest the bottle will be all week. In a large living room nobody notices. In a small closed bedroom, or a nursery, or with a scent you already find generous, that evening can be genuinely too much — and halving the flip halves the step without lowering the plateau you actually live with.
3. The stagger that works is three and three, four days apart. Three reeds on Sunday, the other three on Wednesday, and next week the same two groups in the same order. Every reed still gets turned every seven days. You have changed the timing, not the total.
4. Do not stagger a bottle that has stalled. If the room has gone properly quiet, or a reed lifted out shows a wet line high and dark up the fibre, you need the full correction and you need it today. A three-reed flip on a stalled bottle produces half a recovery and leaves you unsure whether flipping works at all.
5. Do not stagger before guests. Hosting wants the step, not the slope. Flip all six the morning of and close the room for an hour before people arrive.
6. Never flip fewer than three of six as a standing pattern. Two at a time means each reed waits three weeks between turns — that is not smoothing, it is neglect with a schedule attached.
Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
2. Flip only some when your objection is to the surge, not to the level. The first evening after a full flip is the loudest the bottle will be all week. In a large living room nobody notices. In a small closed bedroom, or a nursery, or with a scent you already find generous, that evening can be genuinely too much — and halving the flip halves the step without lowering the plateau you actually live with.
3. The stagger that works is three and three, four days apart. Three reeds on Sunday, the other three on Wednesday, and next week the same two groups in the same order. Every reed still gets turned every seven days. You have changed the timing, not the total.
4. Do not stagger a bottle that has stalled. If the room has gone properly quiet, or a reed lifted out shows a wet line high and dark up the fibre, you need the full correction and you need it today. A three-reed flip on a stalled bottle produces half a recovery and leaves you unsure whether flipping works at all.
5. Do not stagger before guests. Hosting wants the step, not the slope. Flip all six the morning of and close the room for an hour before people arrive.
6. Never flip fewer than three of six as a standing pattern. Two at a time means each reed waits three weeks between turns — that is not smoothing, it is neglect with a schedule attached.
Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
TL;DR: all six weekly is the calibrated pattern. Three and three, four days apart, is the same amount of flipping arranged to remove the spike — worth doing in small closed rooms and with the softer scents. Full flip for a stalled bottle and for hosting. Never fewer than three at a time.
The scent that rewards a staggered flip
SOSA Evening Calm · Kashmir lavender & chamomile ₹799 / 50ml
8.9 on the SOSA strength scale and the softest thing we make, which is the point of it — a bedroom fragrance is meant to be noticed at the door and forgotten by the time you are under the sheet. It is also the composition where a full six-reed flip is most likely to feel like an event in a small closed room, and therefore the one that gains most from being turned three at a time. Alcohol-free and phthalate-free on a heat-stable CCT base. 130ml ₹1,299 for 14–18 weeks.
Part one — the step, the slope, and why the choice is real
Think of each reed as a separate small source with its own little curve. Turn one over and that source rises over a few hours, holds through the evening and eases back over the next day or two towards the level it will keep until you touch it again. What you smell in the room is not one curve but the sum of six. When all six are inverted at the same moment, the six curves are perfectly in phase and the sum is a pronounced peak followed by a visible decline. When three are inverted on Sunday and three on Wednesday, the two groups are out of phase and the peaks partly fill each other's troughs. Same oil, same reeds, same number of hands turning things over. Completely different week.
1
PATTERN ONE · THE STEP
All six at once — maximum correction, maximum surge
Turning every reed together is the strongest single move the format allows without changing anything you own. Six fresh surfaces meet the air simultaneously and the room lifts within a couple of hours; by the following evening it has eased to a level clearly above where it sat before you touched it, and that level is the one that holds. Use the full flip whenever you need certainty rather than subtlety — a bottle that has gone quiet, the week you return from a holiday, the day of a party, or the first flip after a refill. It is also the pattern to use if you are trying to diagnose something, because a partial flip gives you a partial answer and leaves the question open.
The rule: when in doubt, all six. The step exists so that you can tell whether flipping was the problem.
2
PATTERN TWO · THE SLOPE
Three and three — the same week, smoothed
Garden Bloom₹799 · 8.9/10Split the six into two fixed groups of three and turn one group every three or four days. Each individual reed is still flipped once every seven days, so the total wicking work is unchanged and so, near enough, is the life of the bottle. What changes is the profile: while one group is climbing, the other is settling, and the room reads as one continuous level rather than a weekly announcement. This is the pattern I recommend for a small closed bedroom, a nursery, a reading corner, and for anyone who has told me a fragrance is lovely on most days but overwhelming on Sundays. It costs nothing and it is entirely reversible; if you dislike it, you are one full flip away from the default.
The tell: if your complaint is about one evening a week rather than about the other six, staggering is your answer.
3
PATTERN THREE · THE MISTAKE
One or two at a time — a schedule that looks like care
The version of this idea that goes wrong is turning one or two reeds whenever you happen to think of it. With six reeds and two turned a week, each reed waits three weeks between flips; with one a week, six. Residue at the exposed end is not a fixed quantity but an accumulating one, and a fibre reed left standing for three weeks in a Pune summer arrives at the next flip carrying far more of the heavy fraction than one turned every seven days. You end up with a bottle permanently at half rate and — because the oil is still going down slowly — no obvious sign of what is wrong. If you want gentler, use fewer reeds and flip all of them.
Part two — every flip pattern, compared honestly
Five patterns people actually run, what each does to the shape of the week, and who each one suits. The strength language here refers to positions on SOSA's own internal scale at six reeds — our scale, not an industry standard, and not a measure of concentration or quality.
Flip patterns
Same six reeds, five different weeks
| Flip pattern | Reeds turned each time | What the week's curve does | Who it suits | Effect on bottle life |
|---|---|---|---|---|
| All six, once a week ★ | 6 of 6 | A clear step up, then a settle to a steady plateau | Almost everyone — the calibrated default | The stated 6–8 weeks on a 50ml |
| Three and three, four days apart | 3 of 6 | Two offset rises that fill each other's dips — a near-flat line | Small closed bedrooms, nurseries, sensitive noses | Effectively the same; each reed is still turned weekly |
| Two, two and two across the week | 2 of 6 | Flattest of all, but demands you touch the bottle three times | People who genuinely enjoy the ritual and keep to it | The same again — more handling, not more throughput |
| All six, once a fortnight | 6 of 6 | A tall spike and a long slide into a quiet second week | Cool sealed rooms with four reeds; nobody else | Slightly longer, because the bottle spends half its time stalled |
| Three at a time, three weeks apart | 3 of 6 | No real curve — a permanently half-rate bottle | Nobody. This is the pattern to stop doing | Looks longer on the shelf, delivers far less to the room |
| The honest caveat: staggering changes the shape of the week, not the height of the plateau. If your room is quiet on every day of the week rather than only after a flip, no pattern on this table will fix it — that is placement, reed count or composition, and it is covered in does flipping make a diffuser stronger. | ||||
Shop this guide
The scents and sizes a staggered flip suits best
Evening Calm · 8.9/10from ₹799Shop → Garden Bloom · 8.9/10from ₹799Shop → Day & Night duo₹1,498 / 2×50mlShop →
The SOSA principle
How many reeds you flip changes the shape of the week. How many reeds you use changes the height of the plateau.
People reach for a partial flip when what they want is fewer reeds, and reach for more reeds when what they want is a smoother week. Two different dials, and each one only turns its own quantity.
Part three — running a stagger without losing track of it
The objection to staggered flipping is not that it fails but that it is easy to muddle, and a muddled stagger degrades into the one-or-two-at-a-time pattern I asked you not to run. So make the two groups physically identifiable before you start. The simplest method is a dot of clear nail varnish or a fine permanent marker on one end of three reeds — put the mark near the very tip so it spends half its life buried in the oil and never becomes a decorative feature. Marked group on Sunday, unmarked on Wednesday, and after a month you will stop needing to think about it. If you would rather not mark anything, arrange the six as a front three and a back three in the neck of the bottle and keep the groups spatially consistent; a fibre reed is stiff enough to hold its position, and the bottle neck is narrow enough that the two ranks stay distinct.
Two practical points about the mechanics. First, always flip over the bottle, never over the furniture. A staggered pattern means twice as many handling events per week, and reed oil marks wood and stone permanently — lift the three reeds together, invert them as a bundle above the neck, set them back in. Gloves every time, a tray under the bottle whatever pattern you run, and the whole arrangement out of reach of children and pets. Second, do not swirl the bottle while you are in there. The oil is not stratified; the only thing agitation achieves is a film of concentrate around the inside of the neck that then creeps down the outside of the glass.
The last thing to say is where the technique stops. A stagger is a smoothing filter, and a filter cannot add anything that is not there. If the plateau itself is too low — pleasant at the console, absent at the sofa — you are looking at placement, reed count or composition, and the pattern of your flips is irrelevant to all three. Stand outside the room for fifteen minutes and come back in before you conclude anything, because your own nose stops reporting a constant within minutes and adapts hardest in your own home. Then flip all six, then move the bottle into gentle passing air near a doorway at waist to chest height, away from an AC vent and out of direct sun. Staggering is a refinement for a bottle that is already working, not a repair.
A full flip is a statement. A staggered flip is a conversation — same words, spread over the week.
— Sonal Sahani, SOSA
Part four — matching the pattern to the room, and what to buy
Everything above arranged as a decision. Notice how much of this table costs nothing: the pattern is free, and in three of the five rows the recommendation is a change of habit rather than a purchase.
The flip-pattern edit
What you want, the pattern to run, and the scent that suits it
| If you want | Run this pattern | The scent that rewards it | Price |
|---|---|---|---|
| A steady, unremarkable level all week ★ | Three and three, four days apart | Evening Calm at 8.9 in a bedroom | ₹799 / 50ml |
| A bottle brought back from silence | All six, today, then all six weekly | Mountain Breeze at 9.4 for a study | ₹849 / 50ml |
| A room that peaks for visitors | All six on the morning of, room closed an hour before | Garden Bloom at 8.9 in an entryway | ₹799 / 50ml |
| Two rooms on two different rhythms | Full flip in the living room, stagger in the bedroom | Day & Night duo — bright by day, soft by night | ₹1,498 / 2×50ml |
| Any pattern, run for a year without re-buying glass | Keep your vessel; replace the oil when it runs out | 300ml oil refill — oil only, roughly 8–11 months | ₹2,399 |
| Not a flip-pattern problem: scent on demand | No pattern produces a surge that lasts an evening and then stops | Sukoon ultrasonic · 270–320 sq ft, timers, remote | ₹1,899 |
Honest notes for buyers: the strength figures on this page are positions on SOSA's own internal scale at six reeds in an ordinary Indian room — not an industry standard, not a concentration and not a quality ranking. Every bottle ships with six fibre reeds; fibre rather than rattan because rattan's pores clog in Indian humidity, and a clogged reed cannot be rescued by any flip pattern. Refills are oil only — you reuse your own vessel and your own reeds — and reeds are not sold separately, which is an honest gap in the range; our guidance is to refresh them every few months. A 130ml at ₹1,249–₹1,349 lasts 14–18 weeks against 6–8, which is duration and not volume. Reed oil never goes into a Sukoon or Boond, and the water-based Hotel Collection never goes into a reed bottle. Stand the bottle on a tray, keep it out of direct sunlight, and keep it 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.
Two rooms, two flip patterns
SOSA Day & Night duo · Morning Freshness + Evening Calm ₹1,498 / 2×50ml
The pairing that makes the two patterns on this page easy to live with. Morning Freshness — Malabar lemon, peppermint and Nilgiri eucalyptus at 9.0 — takes a full six-reed flip in a kitchen or bathroom where a surge is welcome. Evening Calm — Kashmir lavender and chamomile at 8.9 — takes the three-and-three stagger in a bedroom where it is not. Both alcohol-free and phthalate-free on a heat-stable CCT base. ₹2,498 for two 130ml.
SS
ISIPCA
Versailles
Versailles
A note from Sonal
I came to staggered flipping the way most people come to a technique — by having the complaint first. We were testing an early version of the lavender composition in my own bedroom in Pune, and I noticed I was mildly irritated by it exactly once a week, on the evening I had flipped it. The fragrance was not too strong; the change was. A nose in a familiar room is extremely good at detecting difference and almost useless at detecting a constant, which is why you stop noticing your own diffuser by Tuesday and why the Sunday step is the thing you register.
Halving the flip removed the step without lowering anything I cared about. It is a small, unglamorous piece of technique that sells nothing, which is probably why no other brand mentions it. But the alternative people reach for — pulling reeds out, or moving to a softer scent they did not want — costs them either the plateau or another bottle.
What I would not want you to take from this page is that partial flipping is generally better. It is not. It is a refinement available to a bottle that is already placed well, already at the right reed count, and already delivering the level you want on an ordinary day. If any of those is untrue, flip all six and start at the beginning. Everything here 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 flip all the reeds or only some of them?
All six is the default and the pattern each composition is dosed around. Flip only some — three at a time, four days apart — if your specific objection is the surge on the evening after a flip. Each reed still gets turned every seven days, so the plateau and the bottle life are effectively unchanged; only the shape of the week is different.
Does flipping only half the reeds make the bottle last longer?
Not meaningfully, if you are still turning every reed once a week — the total wicking work is the same and so is the throughput. What genuinely extends a bottle is flipping less often overall, at the cost of a stalled reed and a quiet room. If you want a longer bottle, use four reeds and flip all four weekly.
How do I remember which three reeds I flipped?
Mark one end of three reeds with a dot of clear nail varnish, close to the tip so it sits in the oil half the time. Alternatively keep a front rank and a back rank in the bottle neck — fibre reeds are stiff enough to hold position. Marked group on Sunday, unmarked on Wednesday.
Is it bad to flip only one or two reeds at a time?
Yes, as a standing pattern. With six reeds and two turned a week, each reed waits three weeks between flips — long enough for the heavy fraction to build at the exposed end. You get a half-rate bottle and a slow oil level that looks like good value. If you want gentler, remove reeds instead.
My bottle has gone completely quiet — should I stagger to bring it back gently?
No. Flip all six today. Lift one reed first and find the wet line where soaked fibre meets dry: high and dark means saturated and stalled, and it needs the full correction. Barely above the oil after a day means the reeds are no longer wicking and want refreshing — reeds are the consumable, and we do not sell them separately.
Reed flipping · patterns · 2027
Flip all six to fix a bottle. Flip three and three to smooth one
Evening Calm and Garden Bloom at 8.9 on the SOSA scale from ₹799 for 50ml (6–8 weeks) and ₹1,299 for 130ml (14–18 weeks), six fibre reeds in every bottle. The Day & Night duo is ₹1,498 for two 50ml. Oil-only refills from ₹2,399 for 300ml. Free shipping above ₹499, and a portion of every order supports girl-child education through Nanhi Kali.
Shop Evening Calm → Refill from ₹2,399
Continue the read
More on flipping reed diffuser sticks
- Should you flip reed diffuser sticks? — the residue gradient, and why an unflipped reed becomes a reservoir.
- What happens after a flip — the first ten minutes, the first hour and the first evening, which is the surge this page is smoothing.
- Is once a week enough? and can you flip every day? — the two ends of the cadence question.
- The complete reed-flipping guide — this page and the eight around it, in one place.
- 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 whether to turn every reed at once or half of them at a time, and what each pattern does to the shape of a week. Flip-pattern, reed-count and bottle-life figures are SOSA's own working guidance from in-house testing and customer correspondence rather than laboratory measurement, and vary with room volume, ventilation, temperature, humidity 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.