★ 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 · Diffuser Care & Usage
How many drops? Start with five or six drops per full tank and adjust to taste. Water-based fragrance is concentrated, so add slowly.
What not to do? Do not use thick reed oils or neat essential oils - they can clog the misting plate. Use water-based diffuser fragrance only.
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.
How to use ultrasonic diffuser fragrance
Using an ultrasonic diffuser is genuinely simple, but a few small habits make the difference between a clean, well-scented room and a clogged machine. Here is exactly how to use ultrasonic diffuser fragrance - the steps, the dose, and the care that keeps your diffuser working for years.
Quick answers - read this first
How do I use ultrasonic diffuser fragrance? Fill the tank with clean water to the line, add a few drops of water-based diffuser fragrance, replace the lid and switch on. The diffuser mists the scented water as a cool cloud.How many drops? Start with five or six drops per full tank and adjust to taste. Water-based fragrance is concentrated, so add slowly.
What not to do? Do not use thick reed oils or neat essential oils - they can clog the misting plate. Use water-based diffuser fragrance only.
The short answer
It is simple: water, a few drops, on. Fill to the line, add fragrance, switch on - the diffuser does the rest.
Start with 5-6 drops. Concentrated, so add slowly and adjust to taste.
Water-based only. This is not reed diffuser oil. Thick oils clog the plate - use water-based fragrance.
From ₹299. A few drops of the Hotel Collection scents a room.
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 basics
The simple steps
The detail
Dose, placement and care
The range
Seven hotel-inspired scents
Straight answer
How do I use ultrasonic diffuser fragrance?
It is simple. Fill the tank with clean water to the marked line, add a few drops of water-based diffuser fragrance (start with five or six), replace the lid and switch on. The ultrasonic plate vibrates and mists the scented water as a cool cloud that gently scents the room. Use a water-based fragrance made for diffusers - not reed oil or neat essential oils, which can clog the misting plate. Place the diffuser on a flat surface a little away from where you sit, run it on a low output, and top up the water and fragrance as it runs low. The SOSA Hotel Collection is water-based and made for exactly this, from ₹299.
In one line: fill the tank with water to the line, add five or six drops of water-based diffuser fragrance, switch on. Use water-based fragrance only; thick oils clog the plate.
Ready to scent? The SOSA Hotel Collection - water-based, a few drops per tank. From ₹299.
Shop the Hotel Collection
The simple steps
An ultrasonic diffuser does the work for you - it just needs water and a water-friendly fragrance. The whole process takes under a minute, and once you know the rhythm you will barely think about it.
Here is the routine, start to finish.
How to use it, plainly
To use ultrasonic diffuser fragrance: fill the tank to the line with clean water, add a few drops of water-based fragrance, switch on, and top up as needed. This is not reed diffuser oil - use water-based fragrance made for ultrasonic and humidifier-style diffusers.
If you ever switch scents, empty and rinse the tank first so the new fragrance comes through clean.
Let me clear up two things
✕
"More drops means a better scent." Past a few drops it just gets overwhelming in a closed room. Start low and build.
✕
"Any oil works if it smells nice." Thick reed and carrier oils clog the plate. Only water-based fragrance is right for the tank.
Dose, placement and care
Three habits that keep it scenting cleanly.
1
Dose
Five or six drops, adjust
Start with five or six drops per full tank and add a couple more for larger or open rooms. Concentrated, so build up slowly - you can always add.
2
Placement
Flat surface, a little away
Put it on a flat, stable surface, not on fabric or right beside where you sit, so the mist disperses evenly across the room.
3
Care
Empty and wipe regularly
Empty leftover water when not in use, and wipe the tank and misting plate every few uses so the mist stays clean and strong.
The honest steer
The whole skill is a few drops, the right fragrance, and a clean tank.
Get those right and your diffuser scents a room cleanly for years.
Quick guide
Using it, at a glance
| Step | What to do | Note |
|---|---|---|
| Fill | Clean water to the line | Not over the max line |
| Add | 5-6 drops fragrance | Water-based only |
| Run | Switch on, low output | Place a little away |
| Care | Empty & wipe regularly | Keeps mist clean |
So water, a few drops of water-based fragrance, and a clean tank - that is all it takes. A diffuser scents the room for ambience; 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, made to mist cleanly. Prices below are the 15ml; it also comes in 100ml and 300ml.
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 many drops of fragrance should I use?
Start with five or six per full tank and adjust. Water-based fragrance is concentrated, so add slowly. The SOSA Hotel Collection is water-based.
Do I add fragrance to water or use it neat?
Add a few drops to the water in the tank - it is made to mix with water and mist, not to be used neat.
How often should I refill?
Top up the water and add fresh drops whenever it runs low; empty leftover water when not in use.
Can I leave it running all day?
Many diffusers have a timer or auto-off when the water runs out. Run it gently and refill as needed.
Is the fragrance safe?
Yes - IFRA-standard and phthalate-free. Sensitivity is individual; this is general information, not medical advice.
Ready to choose
SOSA Hotel Collection - simple to use, water-based, for your diffuser
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
- How many drops of fragrance oil in an ultrasonic diffuser?
- Is humidifier fragrance oil safe?
- 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.