★ 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 100ml last? Months of regular use, since a few drops scent a room. It is the sweet spot for a household's main scent.
100ml or 300ml? 100ml suits one main scent for a home; 300ml is the best value for heavy use or a scent you are sure you will use daily for a long time.
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.
Once you know the scent you love, the 100ml is the everyday bottle - months of use at far better value per ml than the trial size. Here is what the 100ml humidifier fragrance oil gives you, and who it suits.
Quick answers - read this first
What is the 100ml for? It is the everyday size (₹999) - for a scent you have already fallen for. Months of regular use at much better value per ml than the 15ml, without the commitment of the largest bottle.How long does 100ml last? Months of regular use, since a few drops scent a room. It is the sweet spot for a household's main scent.
100ml or 300ml? 100ml suits one main scent for a home; 300ml is the best value for heavy use or a scent you are sure you will use daily for a long time.
The short answer
The everyday size. ₹999 - months of use for a scent you love.
Better value than trial. Far better per ml than the 15ml; the household sweet spot.
For your main scent. This is not reed diffuser oil. Water-based, for humidifier and ultrasonic diffusers.
From ₹999. Any of the seven Hotel Collection scents in 100ml.
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.
Straight answer
Should I buy the 100ml humidifier fragrance oil?
The 100ml (₹999) is the everyday size - for a scent you have already tested and love. It gives months of regular use at far better value per ml than the 15ml trial size, without committing to the largest bottle. It is the sweet spot for a household's main scent. If you are certain you will use a scent daily for a long time, the 300ml (₹1799) is the best value; otherwise 100ml is the sensible everyday choice. These are interpretations of hotel scent styles, not the hotels' actual scents.
In one line: the 100ml (₹999) is the everyday size - months of use for a scent you love, far better value per ml than the trial size. The household sweet spot.
Your everyday bottle: the 100ml at ₹999 - months of your favourite scent.
Shop the Hotel Collection
What the 100ml is for
The 100ml is the bottle you buy after the 15ml has done its job. You have found the scent that suits your home, and now you want it around for the long run at a sensible price. Months of use, much better value per ml, and no need to store the largest bottle.
For most households, it is the natural main size.
The 100ml, defined
The 100ml humidifier fragrance oil (₹999) is the everyday size - months of use at far better value per ml than the trial 15ml. This is not reed diffuser oil - it is water-based, for humidifier and ultrasonic diffusers.
If you run diffusers in more than one room, a couple of 100ml bottles in different scents is a lovely, economical way to give each space its own character.
Let me clear up two things
✕
"The trial size is enough forever." Only if you rarely run it. For a scent you use regularly, the 100ml is far better value per ml.
✕
"Always buy the biggest for value." The 300ml is best value, but only worth it for heavy, certain use. 100ml suits most homes.
Who the 100ml suits
The everyday choice, and when to go bigger.
1
A household's main scent
Months of use
If you have one main home scent you run regularly, the 100ml gives months of it at a sensible price - the everyday choice.
2
More than one room
A couple of scents
Two 100ml bottles in different scents let each room have its own character, economically.
3
When to go to 300ml
Heavy, certain use
If you are sure you will use a scent daily for a long time, or scent a large space, the 300ml (₹1799) is the best value per ml.
The honest steer
The 100ml is the everyday sweet spot - value and flexibility for a scent you love.
Test with 15ml, live with 100ml, stock up with 300ml.
Size guide
Which size for you
| Size | Price | Best for |
|---|---|---|
| 15ml | ₹299 | Trying a scent |
| 100ml | ₹999 | Everyday main scent |
| 300ml | ₹1799 | Heavy use, best value |
So the 100ml is the everyday bottle for a scent you love. A diffuser scents the room on a few drops - even the 100ml lasts months, and it does not purify the air.
The SOSA range
The SOSA Hotel Collection is a water-based humidifier fragrance (also for ultrasonic and aroma diffusers) 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 100ml last?
Months of regular use, since a few drops scent a room. The 100ml is the everyday size.
Is 100ml or 300ml better value?
300ml is the best value per ml, but 100ml is the sensible everyday size unless you use a scent heavily and are certain of it.
Should I test before buying 100ml?
Yes - start with a 15ml to confirm the scent, then move to 100ml for your favourite.
Can I mix scents across rooms?
Yes - a couple of 100ml bottles in different scents gives each room its own character.
Is it water-based and diffuser-safe?
Yes - water-based, for humidifier and ultrasonic diffusers. Use SOSA fragrance only to avoid clogging.
Ready to choose
SOSA Hotel Collection - the everyday 100ml, water-based, ₹999
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
- 300ml ultrasonic diffuser fragrance refill
- Best ultrasonic diffuser fragrance under ₹500
- 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.