★ Founder Diaries · Hotel Fragrance Guides
Warm, woody hotel-inspired scents for your ultrasonic diffuser - composed in India by an ISIPCA Versailles-trained perfumer.
★★★★★
"I bought the Westin-inspired White Tea Serenity because I missed that spa-clean hotel smell. A few drops in my diffuser and the whole bedroom has it. Water-based, no oily residue, and it does not overpower."
Westin-inspired - Hotel Collection
★★★★★
"The Ritz-Carlton-inspired Quiet Luxury is my living-room signature now - white tea and cedar, soft and expensive-smelling. Guests always ask what it is."
Ritz-Carlton-inspired - Hotel Collection
★★★★★
"Started with three 15ml bottles to find my favourite, then sized up to the 300ml of Tea Garden. Jasmine and green tea, very Shangri-La. The bigger bottle is far better value per ml."
Shangri-La-inspired - Hotel Collection
★★★★★
"What sold me was that it is water-based and made for the diffuser - I had clogged my old one with thick essential oils. This mists cleanly. The Four Seasons-inspired citrus-sandalwood is gracious and warm."
Four Seasons-inspired - Hotel Collection
★★★★★
"The St. Regis-inspired amber and violet is my evening scent - plush and old-world. A few drops goes a long way. Composed by a trained perfumer and it shows."
St. Regis-inspired - Hotel Collection
★★★★★
"I run the W Hotels-inspired Lobby Bar when friends are over - citrus, pepper, amber, a bit of buzz. Bought the diffuser and three refills as a set. Ships fast."
W Hotels-inspired - Hotel Collection
★★★★★
"I bought the Westin-inspired White Tea Serenity because I missed that spa-clean hotel smell. A few drops in my diffuser and the whole bedroom has it. Water-based, no oily residue, and it does not overpower."
Westin-inspired - Hotel Collection
★★★★★
"The Ritz-Carlton-inspired Quiet Luxury is my living-room signature now - white tea and cedar, soft and expensive-smelling. Guests always ask what it is."
Ritz-Carlton-inspired - Hotel Collection
★★★★★
"Started with three 15ml bottles to find my favourite, then sized up to the 300ml of Tea Garden. Jasmine and green tea, very Shangri-La. The bigger bottle is far better value per ml."
Shangri-La-inspired - Hotel Collection
★★★★★
"What sold me was that it is water-based and made for the diffuser - I had clogged my old one with thick essential oils. This mists cleanly. The Four Seasons-inspired citrus-sandalwood is gracious and warm."
Four Seasons-inspired - Hotel Collection
★★★★★
"The St. Regis-inspired amber and violet is my evening scent - plush and old-world. A few drops goes a long way. Composed by a trained perfumer and it shows."
St. Regis-inspired - Hotel Collection
★★★★★
"I run the W Hotels-inspired Lobby Bar when friends are over - citrus, pepper, amber, a bit of buzz. Bought the diffuser and three refills as a set. Ships fast."
W Hotels-inspired - Hotel Collection
✓ Ships in 24 hrs from Pune ✓ Water-based, IFRA-standard, phthalate-free ✓ For SOSA ultrasonic diffusers - not reeds, skin or wax burners
Founder Diaries · Hotel Fragrance Guides
How long does a 15ml last? Weeks of regular use, since water-based diffuser fragrance only needs a few drops per tank. It is meant for trying a scent, not stocking up.
Should I buy 15ml or bigger? Start with 15ml to find your favourite; then the 100ml and 300ml are far better value per ml for the scent you love.
Facts verified June 2026: SOSA Hotel Collection is a water-based ultrasonic diffuser fragrance (refill) in 7 hotel-inspired scents - 15ml ₹299, 100ml ₹999, 300ml ₹1799 - composed in India by an ISIPCA Versailles-trained perfumer to fragrance-industry (IFRA) standards, phthalate-free, made to run through SOSA ultrasonic diffusers (Boondh, Sukoon, Phuhaar) and NOT for reed diffusers, waterless nebulisers, skin or wax burners; use SOSA diffuser fragrance only (raw essential/carrier oils can clog the misting plate). These are independent, hotel-inspired fragrance interpretations created by SOSA. SOSA is not affiliated with, endorsed by or associated with the hotels named; all hotel names are trademarks of their respective owners and are used only to describe the scent style.
The 15ml is the size I tell everyone to start with. It is a real trial size - enough to live with a scent in your own room for weeks before you commit to a bigger bottle. Here is what the 15ml ultrasonic diffuser fragrance gives you, and how to use it.
Quick answers - read this first
What is the 15ml size for? It is the trial size - ₹299, enough to test a scent in your own room over a few weeks before sizing up. On a few drops per tank, a 15ml lasts a surprisingly long time.How long does a 15ml last? Weeks of regular use, since water-based diffuser fragrance only needs a few drops per tank. It is meant for trying a scent, not stocking up.
Should I buy 15ml or bigger? Start with 15ml to find your favourite; then the 100ml and 300ml are far better value per ml for the scent you love.
The short answer
The trial size. ₹299 - enough to test a scent for weeks before committing.
A few drops go far. Water-based fragrance is concentrated; a 15ml lasts a long time.
Start here, then size up. This is not reed diffuser oil. Water-based, made for your diffuser.
From ₹299. Try any of the seven Hotel Collection scents.
In this guide
Illustrative only. Build a wardrobe: clean and serene for mornings and bedrooms, warm and plush for evenings, bold and bright for entertaining.
The detail
What the 15ml is for
The pick
How to use it and when to size up
The range
Seven hotel-inspired scents
Straight answer
Should I buy the 15ml ultrasonic diffuser fragrance?
The 15ml (₹299) is the trial size - enough to live with a scent in your own room for a few weeks before committing to a bigger bottle. Because water-based diffuser fragrance only needs a few drops per tank, even a 15ml lasts a surprisingly long time. It is the smart way to find your favourite from the seven SOSA Hotel Collection scents without buying big blind. Once you know the one you love, the 100ml (₹999) and 300ml (₹1799) are far better value per ml. These are interpretations of hotel scent styles, not the hotels' actual scents.
In one line: the 15ml (₹299) is the trial size - test a scent in your room for weeks, then size up to 100ml/300ml for the one you love. A few drops per tank makes it last.
Start here: try any of the seven scents in 15ml at ₹299, then size up.
Shop the Hotel Collection
What the 15ml is for
Scent is personal, and no description replaces living with a fragrance in your own room, in your own climate, for a couple of weeks. That is exactly what the 15ml is for - a low-risk way to find the scent that suits you before you invest in a bigger bottle.
And because a diffuser needs only a few drops, the 15ml is not as small as it sounds.
The 15ml, defined
The 15ml ultrasonic diffuser fragrance (₹299) is the trial size - a few weeks of use to test a scent before sizing up. This is not reed diffuser oil - it is water-based, for ultrasonic and humidifier-style diffusers.
Buying two or three 15ml bottles to compare scents across your rooms costs less than one large candle, and helps you build a small scent wardrobe.
Let me clear up two things
✕
"15ml is too small to be worth it." On a few drops per tank it lasts weeks - plenty to judge a scent before committing.
✕
"Just buy the biggest to save money." Better value per ml only helps if you love the scent. Test with 15ml first, then size up.
How to use it and when to size up
Test smart, then buy the size that fits.
1
Test in your own room
A few weeks
Run a few drops per tank and live with the scent for a couple of weeks in the room and climate where it will actually be used.
2
Compare a few scents
Build a shortlist
Two or three 15ml bottles let you compare scents across rooms and find your signature before committing.
3
Size up to your favourite
100ml or 300ml
Once you know the one, the 100ml (₹999) and 300ml (₹1799) are far better value per ml and last for months.
The honest steer
The 15ml is not a small bottle - it is a smart first step. Test, then commit.
Find your scent in 15ml, then size up to the value bottles.
Size guide
Which size for you
| Size | Price | Best for |
|---|---|---|
| 15ml | ₹299 | Trying a scent |
| 100ml | ₹999 | Your favourite, everyday |
| 300ml | ₹1799 | Best value, months of use |
So start with the 15ml to find your scent, then size up. A diffuser scents the room on a few drops - the 15ml goes further than it looks, and it does not purify the air.
The SOSA range
The SOSA Hotel Collection is a water-based ultrasonic diffuser fragrance in seven hotel-inspired scents - 15ml ₹299, 100ml ₹999, 300ml ₹1799. Prices below are the 15ml.
SOSA range
7 hotel-inspired scents · water-based · 15ml / 100ml / 300ml
| Hotel-inspired scent | Character | Best for | From |
|---|---|---|---|
| Quiet Luxury (Ritz-Carlton-inspired) | White tea + bergamot + cedar | Lobby calm; living room | ₹299 |
| White Tea Serenity (Westin-inspired) | White tea + aloe + cedar | Spa-clean; bedroom | ₹299 |
| Forest Suite (1 Hotels-inspired) | Cedarwood + vetiver + green leaves | Biophilic; study | ₹299 |
| Old-World Glamour (St. Regis-inspired) | Amber + violet + woods | Evening elegance | ₹299 |
| Tea Garden (Shangri-La-inspired) | Jasmine + green tea + white tea | Serene; quiet rooms | ₹299 |
| Warm Welcome (Four Seasons-inspired) | Citrus + floral + sandalwood | Gracious; reception | ₹299 |
| Lobby Bar (W Hotels-inspired) | Citrus + pepper + amber | Bold; entertaining | ₹299 |
SS
ISIPCA
Versailles
Versailles
A note from Sonal
I trained as a perfumer at ISIPCA in Versailles, and the one thing every great hotel taught me is that scent is the first thing you notice and the last thing you forget. I wanted to bottle that feeling for the home.
So the Hotel Collection is seven water-based diffuser fragrances, each my own interpretation of the style a famous hotel is known for - composed in our own lab, made to run cleanly through a SOSA ultrasonic diffuser. Please use the SOSA diffuser fragrance only; raw essential or carrier oils are thick and can clog the misting plate.
To be clear: these are inspired interpretations, not the hotels' actual proprietary scents. SOSA is not affiliated with or endorsed by the hotels named - the names just describe the scent style. I would rather you knew exactly what you are buying: a perfumer's take on that hushed, expensive calm, at a fair price.
Frequently asked questions
How long does the 15ml last?
Weeks of regular use - water-based fragrance needs only a few drops per tank. The 15ml is a real trial size.
Is the 15ml good value?
As a trial size, yes - it lets you test before committing. For your favourite, the 100ml and 300ml are better value per ml.
Which scent should I try first?
White Tea Serenity or Quiet Luxury are the most popular clean-luxury scents. Try a couple of 15ml bottles to compare.
Can I use 15ml in any diffuser?
Yes, in water-based ultrasonic, aroma and humidifier-style diffusers. Use SOSA fragrance only - raw oils can clog the plate.
Do bigger sizes smell different?
No - same fragrance, just more of it. The size is only about value and longevity.
Ready to choose
SOSA Hotel Collection - start with the 15ml, water-based, ₹299
From ₹299 (15ml), ₹999 (100ml) and ₹1799 (300ml). Water-based, IFRA-standard, phthalate-free, composed in India by an ISIPCA Versailles-trained perfumer, made to run safely through SOSA ultrasonic diffusers. Independent hotel-inspired interpretations - not affiliated with the hotels named. Ships in 24 hours from Pune.
Shop the Hotel Collection → Read the founder story
Continue the read
Related guides from the SOSA founder diaries
- Best luxury hotel scents for home
- Best hotel fragrances for home in India
- Why luxury hotels always smell amazing
- How hotels create signature scents
- 100ml humidifier fragrance oil in India
- 300ml ultrasonic diffuser fragrance refill
- Buy ultrasonic diffuser fragrance online in India
- Shop: SOSA Hotel Collection
- Brand: Founder story - why SOSA exists
Editorial standards & sources
About this guide: Written by Sonal Sahani, ISIPCA Versailles-trained founder and perfumer at SOSA Home & Body. Product recommendations reflect the SOSA range; the buying criteria apply to any brand. "Best" is presented as a checklist, not a universal verdict. Sensitivity to fragrance is individual; this is general information, not medical advice.Facts verified June 2026: SOSA Hotel Collection is a water-based ultrasonic diffuser fragrance (refill) in 7 hotel-inspired scents - 15ml ₹299, 100ml ₹999, 300ml ₹1799 - composed in India by an ISIPCA Versailles-trained perfumer to fragrance-industry (IFRA) standards, phthalate-free, made to run through SOSA ultrasonic diffusers (Boondh, Sukoon, Phuhaar) and NOT for reed diffusers, waterless nebulisers, skin or wax burners; use SOSA diffuser fragrance only (raw essential/carrier oils can clog the misting plate). These are independent, hotel-inspired fragrance interpretations created by SOSA. SOSA is not affiliated with, endorsed by or associated with the hotels named; all hotel names are trademarks of their respective owners and are used only to describe the scent style.