★ SOSA reed diffusers · changing scent
The glass will take any of our five scents. The reeds are the part that remembers the last one
★ ★ ★ ★ ★
★★★★★
"I poured lemon-mint over coffee-vanilla reeds and got a third smell nobody asked for. Washed the glass, new reeds, fixed."
Fresh Brew to Morning Freshness
★★★★★
"Twenty-four hours of drying sounded fussy until I did it in twelve and the oil went cloudy. Wait the day."
Vessel wash
★★★★★
"Pine to lemon-mint was seamless — the eucalyptus carried straight through. Exactly as described here."
Mountain Breeze to Morning Freshness
★★★★★
"Being told plainly that a scent change needs a bottle, not a refill, saved me an annoyed evening."
Bought Garden Bloom 50ml
★★★★★
"Coffee-vanilla into rose-jasmine was the easy direction. Going back the other way was not, and they said so first."
Warmth & Bloom pairing
★★★★★
"Half a bottle of lavender left and I nearly topped it up with something else. Glad I read the bit about not blending in the vessel."
Evening Calm
★★★★★
"I poured lemon-mint over coffee-vanilla reeds and got a third smell nobody asked for. Washed the glass, new reeds, fixed."
Fresh Brew to Morning Freshness
★★★★★
"Twenty-four hours of drying sounded fussy until I did it in twelve and the oil went cloudy. Wait the day."
Vessel wash
★★★★★
"Pine to lemon-mint was seamless — the eucalyptus carried straight through. Exactly as described here."
Mountain Breeze to Morning Freshness
★★★★★
"Being told plainly that a scent change needs a bottle, not a refill, saved me an annoyed evening."
Bought Garden Bloom 50ml
★★★★★
"Coffee-vanilla into rose-jasmine was the easy direction. Going back the other way was not, and they said so first."
Warmth & Bloom pairing
★★★★★
"Half a bottle of lavender left and I nearly topped it up with something else. Glad I read the bit about not blending in the vessel."
Evening Calm
✓ Six fibre reeds per bottle · a scent change needs a fresh set, and reeds are not sold separately ✓ Refills are oil only — 300ml ₹2,399 · 500ml ₹3,499 ✓ Five compositions · alcohol-free, phthalate-free, handmade in Pune
Founder Diaries · Reed Diffusers · Changing Scent
The reeds are the problem. Fibre holds the old composition inside the channels the oil travels through. Washing does not recover them. A clean scent change needs six new reeds.
The honest consequence: reeds are not sold separately, so a fragrance change is a bottle purchase — from ₹749 for a 50ml — not a refill purchase.
Never blend in the vessel. Do not pour a new scent onto a half-finished old one. You get an uncontrolled third fragrance and no way back.
Fresh Brew₹849 · 9.5/10The vessel keeps a thin oily film on the inside wall and around the neck, and it is genuinely removable: warm water, a little washing-up liquid, a thorough rinse. What matters more is the step afterwards. The bottle must be completely dry before new oil goes in — give it a full day, inverted, in warm moving air. Oil and water do not mix, so anything left in the base sits beneath the new oil rather than dispersing into it, and the first thing you will notice is that the fragrance looks cloudy and reads oddly. Do not try to speed it up by pushing a cloth or kitchen towel down the neck; it sheds fibres and leaves its own smell. Time is the only reliable dryer.
Morning Freshness · from pinefrom ₹749Shop → 
Garden Bloom · from coffeefrom ₹799Shop → 
Warmth & Bloom duo · no changeover₹1,598Shop →
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.
Yes, and the glass part is easy — our vessels are inert, refillable and will happily take any of the five compositions we make. The difficulty is never the bottle. It is the six reeds standing in it, which have spent two months absorbing the fragrance you are trying to leave behind and will keep reporting it for weeks. A scent change done properly is an empty vessel, a wash, a full day of drying and a fresh set of reeds. Done improperly it is a ghost — two fragrances at once, neither of them the one you chose.
Quick answers — read this first
Can you? Yes. The vessel is inert and refillable. Empty it completely, wash with warm soapy water, rinse well, and let it dry for a full 24 hours before the new oil goes in.The reeds are the problem. Fibre holds the old composition inside the channels the oil travels through. Washing does not recover them. A clean scent change needs six new reeds.
The honest consequence: reeds are not sold separately, so a fragrance change is a bottle purchase — from ₹749 for a 50ml — not a refill purchase.
Never blend in the vessel. Do not pour a new scent onto a half-finished old one. You get an uncontrolled third fragrance and no way back.
The short answer
Short answer: yes, you can put a different SOSA fragrance into an existing SOSA reed diffuser bottle, provided the bottle is empty, properly washed and completely dry, and provided you use new reeds. All five compositions sit on the same alcohol-free, phthalate-free CCT base, so nothing about the oils themselves objects. What objects is residue — in the fibre first, on the glass second.
The mechanism: oil climbs a fibre reed by capillary action, and over weeks the heavier, slower part of the fragrance settles in those channels. That deposit is inside the reed, not on it, which is why rinsing achieves nothing. Pour a cold citrus over reeds full of coffee and vanilla and the reeds will keep delivering coffee and vanilla underneath it — the effect people describe as a diffuser that smells of two things at once.
Shop: a scent change means a bottle, because that is where six fresh fibre reeds come from — Garden Bloom and Evening Calm ₹799, Fresh Brew and Mountain Breeze ₹849, Morning Freshness ₹749, all 50ml. Free shipping above ₹499.
In this guide
Cleanest change from Mountain Breeze
Morning Freshness · from ₹749
Cleanest change from Fresh Brew
Garden Bloom · from ₹799
Two vessels, no changeover at all
Warmth & Bloom duo · ₹1,598
Straight answer
How do I change the fragrance in my reed diffuser without it smelling of both?
1. Finish the old oil first. Do not pour a new scent onto a half-full bottle. Blending two finished compositions in a vessel does not give you a nice hybrid; it gives you an accidental third fragrance with no formula behind it, and you cannot separate them again.
2. Empty and wash the vessel. Warm water and a little washing-up liquid, a bottle brush if the neck allows one, then rinse thoroughly. The glass carries a thin oily film that will tint the first few weeks of anything you pour in.
3. Dry it completely — a full 24 hours, upside down. This is the step people skip. Oil and water do not mix; water left in the base will sit under the new oil and cloud it. Warm, moving air and patience, not a cloth pushed into the neck.
4. Use new reeds. All six, together. The old set holds the old composition inside the fibre and cannot be washed clean. Reeds are not sold separately at SOSA, so in practice a scent change is a bottle purchase — from ₹749 for a 50ml, six fresh fibre reeds included. I would rather say that plainly than let you buy a ₹2,399 refill and find no reeds in the parcel.
5. Pour to the neck, stand the reeds in, flip once. The single flip coats both ends and starts the wick evenly. Gloves on, tray underneath — reed oil marks wood and stone.
6. Give it three days before you judge it. A fresh set of dry reeds produces a days-one-to-three spike as the top notes leave, then settles over a week or two into the plateau that holds for the rest of the bottle. The plateau is the product, not the spike.
Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
2. Empty and wash the vessel. Warm water and a little washing-up liquid, a bottle brush if the neck allows one, then rinse thoroughly. The glass carries a thin oily film that will tint the first few weeks of anything you pour in.
3. Dry it completely — a full 24 hours, upside down. This is the step people skip. Oil and water do not mix; water left in the base will sit under the new oil and cloud it. Warm, moving air and patience, not a cloth pushed into the neck.
4. Use new reeds. All six, together. The old set holds the old composition inside the fibre and cannot be washed clean. Reeds are not sold separately at SOSA, so in practice a scent change is a bottle purchase — from ₹749 for a 50ml, six fresh fibre reeds included. I would rather say that plainly than let you buy a ₹2,399 refill and find no reeds in the parcel.
5. Pour to the neck, stand the reeds in, flip once. The single flip coats both ends and starts the wick evenly. Gloves on, tray underneath — reed oil marks wood and stone.
6. Give it three days before you judge it. A fresh set of dry reeds produces a days-one-to-three spike as the top notes leave, then settles over a week or two into the plateau that holds for the rest of the bottle. The plateau is the product, not the spike.
Composed and handmade in small batches in Pune, and a portion of every order supports girl-child education through Nanhi Kali.
TL;DR: yes — empty the vessel, wash it, dry it a full 24 hours, and fit six new reeds. The glass changes scent easily; the fibre does not. Since reeds only come with bottles, a fragrance change means buying a bottle from ₹749 rather than an oil refill.
The scent that ghosts worst — and cleanest
SOSA Morning Freshness · Malabar lemon, peppermint & Nilgiri eucalyptus ₹749 / 50ml
Cold, sharp and transparent, which makes it the least forgiving thing to pour over tired reeds — anything left in the fibre shows through it immediately. From Mountain Breeze it is the smoothest change in the range, because the two meet on green eucalyptus. From Fresh Brew it is the hardest, and needs new reeds without exception. 9.0 on our own internal strength scale at six reeds. 130ml ₹1,249 for 14–18 weeks.
Part one — what a ghost actually is, and where it lives
When someone tells me their diffuser smells of two things, they usually blame the new oil. The new oil is almost never at fault. A ghost has three possible homes, and they are unequal — the reeds hold most of it, the glass a little, and the room itself more than people expect. Knowing which one you are dealing with tells you whether the fix is a wash, a purchase or simply a week of patience.
1
HOME ONE · WHERE THE GHOST MOSTLY LIVES
Inside the fibre, not on it
A fibre reed is a bundle of narrow channels, and the oil moving up them leaves its heaviest, slowest material behind as the light molecules evaporate off the exposed end. After a couple of months those channels hold a real quantity of the old composition — enough that a fresh, quiet fragrance poured over them reads as a blend rather than a replacement. The deposit is inside the reed, so nothing you do to the outside recovers it: rinsing, wiping and standing them in soapy water all fail, and soaking simply gives you a wet reed that still smells of coffee. This is also why the effect is worst going from a rich composition to a light one — the residue is loud and the new arrival is transparent.
The rule: a fragrance change and a fresh set of six reeds are the same decision. Treat them as one purchase.
2
HOME TWO · EASILY DEALT WITH
The film on the glass, and the water problem
Fresh Brew₹849 · 9.5/10The vessel keeps a thin oily film on the inside wall and around the neck, and it is genuinely removable: warm water, a little washing-up liquid, a thorough rinse. What matters more is the step afterwards. The bottle must be completely dry before new oil goes in — give it a full day, inverted, in warm moving air. Oil and water do not mix, so anything left in the base sits beneath the new oil rather than dispersing into it, and the first thing you will notice is that the fragrance looks cloudy and reads oddly. Do not try to speed it up by pushing a cloth or kitchen towel down the neck; it sheds fibres and leaves its own smell. Time is the only reliable dryer.
The step everyone skips: twenty-four hours upside down. Half a day is not enough in a humid month.
3
HOME THREE · THE ONE THAT IS NOT THE BOTTLE
The room remembers too
Soft furnishings hold fragrance. A living room that has carried Fresh Brew for six months has coffee and vanilla in the curtains, the sofa and the rug, and on the first evening of a new scent you will smell both no matter how perfect your changeover was. That is not a failure of the wash. Air the room properly — windows open for a good while, fans on — and give it a week; the old fragrance leaves soft materials far faster than it leaves fibre reeds. Judge a scent change on day seven, not day one. The same principle explains a subtler thing: your nose adapts hardest at home, so the fragrance you are leaving may be far less present to you than you assume, and the one you are arriving at far more.
Part two — which changes go cleanly, and which fight
Two SOSA compositions in one vessel, one after the other, behave much like two in one room: the transition is smooth when the two share something, and seams show when they do not. The table is written for a properly washed vessel; the ghost-risk column tells you how much the reeds matter in each direction, which is the variable most people get wrong.
The changeover matrix
Going from one SOSA composition to another
| From | To | Where the two meet | Ghost risk on old reeds | What the change needs |
|---|---|---|---|---|
| Mountain Breeze ★ | Morning Freshness | Green eucalyptus running through both | Low — the overlap reads as continuity | Wash, dry, new reeds if the set is over three months old |
| Fresh Brew | Garden Bloom | Warmth and a soft musky floor under both | Low to moderate — vanilla flatters rose | Wash, dry, new reeds preferred |
| Garden Bloom | Evening Calm | Both soft and floral-adjacent, both 8.9 | Moderate — jasmine lingers over lavender | New reeds, or accept a blurred fortnight |
| Evening Calm | Mountain Breeze | Little in common beyond a quiet register | Moderate — but the woods dominate quickly | New reeds; the strong scent wins within days |
| Fresh Brew | Morning Freshness | Nothing — 9.5 warm-deep against 9.0 cold-bright | High — the worst change in the range | New reeds without exception, and air the room |
| The honest caveat: every row that says "new reeds" is asking for something we do not sell on its own. Reeds are not a separate SKU at SOSA — six fresh fibre reeds arrive only inside a bottle, from ₹749. So the correct purchase for a fragrance change is a 50ml or 130ml bottle of the new scent, not a ₹2,399 oil refill, and your washed vessel becomes the spare you refill later. We would rather publish that awkwardness than sell you the wrong item. | ||||
Shop this guide
The three changes people make most
Morning Freshness · from pinefrom ₹749Shop → Garden Bloom · from coffeefrom ₹799Shop → Warmth & Bloom duo · no changeover₹1,598Shop →
The SOSA principle
The vessel takes a new fragrance in an afternoon. The reeds never do.
Wash the glass because it is easy and it helps. Replace the fibre because it is the only part that genuinely holds the old composition, and nothing you can do at a sink will change that.
Part three — if you are going to reuse the reeds anyway
Sometimes the fresh set is not available, or the change is small, or you would simply rather not buy a bottle this month. That is a legitimate position and there is a sensible way to do it. Choose the direction of travel carefully. Going from a lighter composition to a heavier one is far more forgiving than the reverse: pour Mountain Breeze at 9.4 over reeds that carried Morning Freshness and within a few days the woods simply take over, whereas pouring Morning Freshness over reeds full of Fresh Brew leaves cold lemon sitting on top of warm coffee for a fortnight, and the result is genuinely unpleasant. If you must reuse, travel upwards in weight and downwards in transparency, not the other way.
The second concession is time. Old reeds carrying a new oil will blur for one to three weeks depending on how heavy the previous composition was and how long it stood in the vessel. Flip them once at the start and once more after three or four days, which pushes the exposed residue back into the oil and brings cleaner fibre to the air; then leave the room alone for a week before deciding anything. What you must not do is add fresh reeds beside the old ones — a bottle wicking at two different rates gives you an uneven room and makes it impossible to tell whether the change worked. Six together, always.
And the option most people overlook, which is often cheaper than it sounds: keep both. A 50ml of the new scent at ₹749–₹849 gives you a second vessel with its own six fresh reeds, and you now have two rooms scented rather than one room re-scented — a bedroom and an entryway, or a study and a living room. Two 50ml at opposite ends of an open plan also cover far more than one bottle ever will, because a reed diffuser is a point source with no propulsion behind it. Our duo sets exist for exactly this reason at ₹1,498–₹1,598 for two 50ml bottles, and the pairs are chosen so that the two scents share a note and meet without a seam if the rooms are connected.
Nobody has ever complained that the glass remembered the last fragrance. They complain about the reeds, every time.
— Sonal Sahani, SOSA
Part four — the changeover, step by step
Forty minutes of work spread across a day and a half, most of it waiting. Do it on a Saturday morning and the new fragrance starts its first proper evening on Sunday.
The changeover procedure
Seven steps, in order, with the reason for each
| Step | What to do | Why it matters | How long |
|---|---|---|---|
| 1 ★ | Run the old oil out completely — do not top up over it | Blending in the vessel makes an uncontrolled third fragrance | Days to weeks — wait for it |
| 2 | Remove the reeds, gloves on, and set them aside on a tray | Reed oil marks wood and stone within minutes | One minute |
| 3 | Wash the vessel in warm water with washing-up liquid, rinse thoroughly | Removes the oily film on the wall and around the neck | Five minutes |
| 4 | Stand it upside down to dry for a full 24 hours | Oil and water do not mix; trapped water clouds the new oil | A day — the step people skip |
| 5 | Fit six new fibre reeds, never a mix of old and new | Old fibre holds the old composition and cannot be washed clean | One minute · reeds come with a bottle |
| 6 | Pour the new oil to the neck, return the reeds, flip once | Coats both ends and starts the wick evenly | Two minutes |
| 7 | Air the room well, then leave it a week before judging | Soft furnishings hold the old scent; new reeds spike for days 1–3 | Seven days |
Honest notes for buyers: a fragrance change needs new reeds, and reeds are not sold as a separate item at SOSA — six fresh fibre reeds arrive only with a bottle, from ₹749 for 50ml and ₹1,249 for 130ml. Our refills are oil only at ₹2,399 for 300ml and ₹3,499 for 500ml, which makes them the right purchase for continuing a scent and the wrong one for changing it. All five compositions share the same alcohol-free, phthalate-free, paraben-free, IFRA-compliant CCT base, so no combination is unsafe — the caution here is aesthetic, not chemical. Reed oil never goes into a Sukoon or Boond, and the water-based Hotel Collection never goes into a reed bottle. Keep everything out of direct sun and 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 change you do not have to make
SOSA Warmth & Bloom duo · Fresh Brew + Garden Bloom ₹1,598 / 2 × 50ml
Two vessels, twelve fibre reeds and two compositions chosen because they meet on warmth and a soft musky floor rather than colliding. If what you actually want is a different fragrance as well as the one you have, this is cheaper and better than a changeover: nothing to wash, nothing to ghost, and two rooms scented instead of one re-scented. ₹2,598 for 2 × 130ml if you want 14–18 weeks a bottle. Both vessels are refillable afterwards with the oil-only refill.
SS
ISIPCA
Versailles
Versailles
A note from Sonal
At Versailles we were taught to treat a blotter as disposable for a reason: fibre remembers. You never assess a new composition on paper that has carried another one, because the second fragrance arrives wearing the first. A reed is a blotter that has been standing in oil for two months, and everything I was taught about that applies here with more force, not less.
So when someone writes to say their new lemon-mint smells faintly of coffee, I know before I read the second line what happened. The vessel was washed beautifully. The reeds went straight back in. It is the single most common changeover mistake and it is entirely understandable, because the reeds look clean and the bottle looks dirty, and the truth is the other way round.
I will not pretend the fix is convenient while we do not sell reeds on their own. It means a fragrance change costs a bottle rather than a refill, and I would rather write that sentence than have you pour ₹2,399 of oil over six reeds that will spoil it. If the honest answer is that you should simply keep both fragrances in two vessels, I would sooner sell you that. Everything is composed and handmade in Pune, and a part of every order funds a girl's classroom through Nanhi Kali.
Frequently asked questions
Can I put a different fragrance in my existing reed diffuser bottle?
Yes. Empty it fully, wash it in warm soapy water, rinse and dry it upside down for a full 24 hours, then fit six new reeds and pour the new oil to the neck. All five SOSA compositions sit on the same CCT base, so nothing about the change is unsafe — the only real obstacle is residue in the old reeds.
Do I really need new reeds to change fragrance?
For a clean change, yes. The old composition sits inside the fibre channels rather than on the surface, so washing or soaking does not recover them. If you reuse the set, expect one to three weeks of blur and travel from a lighter scent to a heavier one rather than the reverse. Reeds are not sold separately, so a fresh set means buying a bottle from ₹749.
Can I mix two SOSA reed diffuser oils in one bottle?
You can, but I would not. Two finished compositions poured together produce a third that nobody balanced, and the result is usually muddier than either. If you want two fragrances in one space, run two bottles that share a note — Mountain Breeze with Morning Freshness on green eucalyptus, or Fresh Brew with Garden Bloom on warmth.
Why does my new fragrance still smell of the old one?
Three possible sources, in order of likelihood: the reeds, which hold the old composition inside the fibre; the film left on the glass, which a proper wash removes; and the room itself, since curtains, sofas and rugs hold months of fragrance. Air the room, replace the reeds, and judge on day seven rather than day one.
Which fragrance change is the hardest?
Fresh Brew to Morning Freshness — 9.5 warm-deep coffee and vanilla to 9.0 cold, transparent lemon and peppermint, with nothing shared between them. Do that one with new reeds and a well-aired room. The easiest is Mountain Breeze to Morning Freshness, which meet on green eucalyptus and read as continuity rather than a switch.
Changing fragrance · 2027
Keep the glass, wash it, dry it — but retire the reeds with the old scent
New compositions from ₹749 for 50ml and ₹1,249 for 130ml, each arriving with six fresh fibre reeds — the only way we currently supply them. Duo sets at ₹1,498–₹1,598 for two 50ml bottles if you would rather run both fragrances than swap one for the other. Oil-only refills at ₹2,399 for 300ml when you are continuing a scent rather than changing it. Free shipping above ₹499, and a portion of every order supports girl-child education through Nanhi Kali.
Shop a new scent → Same scent · refill ₹2,399
Continue the read
More on refills, reeds and changing scent
- Can you reuse reed sticks with a new fragrance? — the same question from the reed side.
- Should you try a new fragrance when refilling? — rotation against a signature scent.
- Refill or a new diffuser? and how often reeds actually need replacing.
- The complete stick-replacement guide — everything about reed condition 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 changing the fragrance in an existing reed diffuser vessel without carry-over. Changeover timings, drying times and ghosting durations are SOSA's own working guidance from in-house testing and customer correspondence, not laboratory measurements; results vary with composition, reed age, room volume and season. Arithmetic flag: where per-millilitre comparisons appear elsewhere in this cluster they are division on listed prices (₹2,399 ÷ 300ml ≈ ₹8; ₹3,499 ÷ 500ml ≈ ₹7) rather than measured figures. Strength ratings are positions on SOSA's internal scale at six reeds, not an industry standard. Reeds are not sold as a separate SKU. 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.