★ 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
Where do I buy refills in India? Directly from sosahomeandbody.com - the SOSA Hotel Collection is a refill fragrance in 15ml, 100ml and 300ml, shipped in 24 hours from Pune.
Which size refill should I buy? 15ml to try, 100ml for everyday, 300ml for best value. Match the size to how often you run your diffuser.
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 your diffuser is running low, you do not replace the machine - you refill the fragrance. Here is how ultrasonic diffuser fragrance refills work in India, and where to buy them.
Quick answers - read this first
What is an ultrasonic diffuser fragrance refill? It is simply more of the water-based fragrance you add to your diffuser's tank - a bottle of scent, not a new machine. A few drops per tank, topped up as it runs low.Where do I buy refills in India? Directly from sosahomeandbody.com - the SOSA Hotel Collection is a refill fragrance in 15ml, 100ml and 300ml, shipped in 24 hours from Pune.
Which size refill should I buy? 15ml to try, 100ml for everyday, 300ml for best value. Match the size to how often you run your diffuser.
The short answer
Refill the scent, not the machine. A refill is more water-based fragrance for your diffuser's tank.
Buy from the source. sosahomeandbody.com - 15ml/100ml/300ml, ships from Pune.
A few drops per tank. This is not reed diffuser oil. Water-based refill, for ultrasonic diffusers.
From ₹299. Refill 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
How refills work
The pick
Where to buy refills in India
The range
Seven hotel-inspired scents
Straight answer
Where do I buy an ultrasonic diffuser fragrance refill in India?
An ultrasonic diffuser fragrance refill is simply more of the water-based fragrance you add to your diffuser's tank - a bottle of scent, not a new machine. You top up a few drops per tank as it runs low. In India, buy refills directly from sosahomeandbody.com: the SOSA Hotel Collection refill comes in 15ml (₹299), 100ml (₹999) and 300ml (₹1799), water-based, composed by an ISIPCA perfumer, shipped in 24 hours from Pune. Match the size to how often you run your diffuser. These are interpretations of hotel scent styles, not the hotels' actual scents.
In one line: a diffuser refill is more water-based fragrance for your tank, not a new machine. Buy SOSA refills (15ml/100ml/300ml) from sosahomeandbody.com, shipped from Pune.
Refill your diffuser: the Hotel Collection in 15ml, 100ml or 300ml. From ₹299.
Shop the Hotel Collection
How refills work
A refill is the simplest thing - it is just more fragrance. Your ultrasonic diffuser is the machine; the fragrance is the consumable you top up. A few drops per tank, and when the bottle runs low you buy another. There is no cartridge or special part - just a bottle of water-based scent.
So 'refill' really means the fragrance bottle itself, in whatever size suits you.
Refill, defined
An ultrasonic diffuser fragrance refill is a bottle of water-based fragrance to top up your diffuser's tank - a few drops at a time. This is not reed diffuser oil - it is water-based, for ultrasonic and humidifier-style diffusers, in 15ml, 100ml and 300ml.
Keep a refill on hand in your favourite scent so your diffuser never runs empty - the 300ml is the economical restock for daily use.
Let me clear up two things
✕
"A refill is a special cartridge." No - it is simply a bottle of the water-based fragrance you add to the tank. No cartridge needed.
✕
"I need to buy a new diffuser when it runs out." No - you refill the fragrance. The machine keeps going for years if kept clean.
Where to buy refills in India
The simple route, and the right size.
1
Buy from the source
sosahomeandbody.com
Refills ship in 24 hours from Pune, in 15ml, 100ml and 300ml, water-based and made for ultrasonic and humidifier diffusers.
2
Match size to use
15ml / 100ml / 300ml
15ml to try a scent, 100ml for everyday, 300ml for best value and daily use - match it to how often you run the diffuser.
3
Keep one on hand
Never run empty
Stock your favourite scent so the diffuser never lapses. The 300ml is the economical restock.
The honest steer
A refill is just more scent - buy the size that matches your habit and keep one on hand.
Refill the fragrance, keep the machine - that is how a diffuser lasts for years.
Refill sizes
Which refill to buy
| Size | Price | Best for |
|---|---|---|
| 15ml | ₹299 | Trying a scent |
| 100ml | ₹999 | Everyday refill |
| 300ml | ₹1799 | Best value, daily use |
So a refill is simply more water-based fragrance for your diffuser - buy it from sosahomeandbody.com in the size that suits you. A diffuser scents the room on a few drops, 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
Where can I buy diffuser refills in India?
Directly from sosahomeandbody.com - the Hotel Collection refill in 15ml, 100ml and 300ml, shipped in 24 hours from Pune.
Is a refill a special cartridge?
No - it is simply a bottle of water-based fragrance you add to your diffuser's tank, a few drops at a time.
Which refill size should I buy?
15ml to try, 100ml for everyday, 300ml for best value and daily use.
Will the refill work in my diffuser?
Yes, in water-based ultrasonic, aroma and humidifier-style diffusers. Use SOSA fragrance only to avoid clogging.
How fast is delivery?
SOSA ships within 24 hours from Pune; transit depends on your city.
Ready to choose
SOSA Hotel Collection - refill your diffuser, water-based, from ₹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
- Best value ultrasonic diffuser fragrance in India
- Where to buy ultrasonic diffuser fragrance in India
- 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.