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Mainstays

Mainstays Round Ultrasonic Cool Mist Top Fill Humidifier with Aroma, Black

4.3 stars out of 191 reviews
(4.3)|
191 ratings
Mainstays Round Ultrasonic Cool Mist Top Fill Humidifier with Aroma, BlackMainstays Round Ultrasonic Cool Mist Top Fill Humidifier with Aroma BlackMainstays Round Ultrasonic Cool Mist Top Fill Humidifier with Aroma Vanilla DreamMainstays Round Ultrasonic Cool Mist Top Fill Humidifier with Aroma Blue3 pack Mainstays Round Ultrasonic Cool Mist Top Fill Humidifier with Aroma Vanilla Dream3 pack Mainstays Round Ultrasonic Cool Mist Top Fill Humidifier with Aroma Blue3 pack Mainstays Round Ultrasonic Cool Mist Top Fill Humidifier with Aroma Black
Actual Color:Black
selected, Black, $33.82
Vanilla Dream, $33.82
Blue, $33.82, Out of stock
Pack Size:Single

Key item features

  • Extended Operation: Provides up to 60 hours of continuous cool mist on the low setting, with actual run times varying based on environmental factors and mist level.
  • Comforting Ambiance: Features a warm yellow night light and utilizes ultrasonic technology to evenly disperse moisture, enhancing room comfort.
  • Protective Benefits: Helps reduce static electricity, benefiting electronics, and protects wood floors, furniture, and indoor plants by maintaining consistent moisture.
  • Safety Features: Equipped with an automatic shut-off mechanism that activates when the 1-gallon tank is empty, ensuring safe operation.
  • Optimal Coverage: Designed to effectively humidify an area of up to 372 square feet, making the environment feel warmer and more comfortable.
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Current price is $33.82
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Comparison Chart:
Humidification methodUltrasonicMainstays Round Ultrasonic Cool Mist Top Fill Humidifier with Aroma, BlackUltrasonicMainstays 0.72 Gallon Ultrasonic Cool Mist Humidifier, BlackUltrasonicCool Mist Humidifiers for Bedroom 3 L Water Tank Quiet Ultrasonic Air Vaporizer,Adjustable Mist Level, BlackUltrasonicDREO Cool Mist Humidifier for Room, 3.7L Top-Fill & 35H Runtime Ultrasonic Humidifier, Custom Humidity Setting, Light Indicator & Aroma Tray, 26dB Quiet Humidifier for Home, Baby Bedroom, WhiteUltrasonicSafety 1st Easy-Fill Cool Mist Humidifier, WhiteUltrasonicRAPOBRIX 3L Cool Mist Humidifier with 7 Cycling Colors - Top Fill for Room & HomeUltrasonicEquate Ultrasonic Humidifier, Diffuser, Cool Mist, Visible Mist, Filter-Free, 0.5 Gallon, White and Wooden
Coverage area372 sq ftMainstays Round Ultrasonic Cool Mist Top Fill Humidifier with Aroma, Black372 sq ftMainstays 0.72 Gallon Ultrasonic Cool Mist Humidifier, Black430 sq ftCool Mist Humidifiers for Bedroom 3 L Water Tank Quiet Ultrasonic Air Vaporizer,Adjustable Mist Level, Black300 sq ftDREO Cool Mist Humidifier for Room, 3.7L Top-Fill & 35H Runtime Ultrasonic Humidifier, Custom Humidity Setting, Light Indicator & Aroma Tray, 26dB Quiet Humidifier for Home, Baby Bedroom, White218 sq ftSafety 1st Easy-Fill Cool Mist Humidifier, White10 sq ftRAPOBRIX 3L Cool Mist Humidifier with 7 Cycling Colors - Top Fill for Room & Home150 sq ftEquate Ultrasonic Humidifier, Diffuser, Cool Mist, Visible Mist, Filter-Free, 0.5 Gallon, White and Wooden
Run time60 hMainstays Round Ultrasonic Cool Mist Top Fill Humidifier with Aroma, Black30 hMainstays 0.72 Gallon Ultrasonic Cool Mist Humidifier, Black12 hCool Mist Humidifiers for Bedroom 3 L Water Tank Quiet Ultrasonic Air Vaporizer,Adjustable Mist Level, Black35 hDREO Cool Mist Humidifier for Room, 3.7L Top-Fill & 35H Runtime Ultrasonic Humidifier, Custom Humidity Setting, Light Indicator & Aroma Tray, 26dB Quiet Humidifier for Home, Baby Bedroom, White24 hSafety 1st Easy-Fill Cool Mist Humidifier, White60 hRAPOBRIX 3L Cool Mist Humidifier with 7 Cycling Colors - Top Fill for Room & Home24 hEquate Ultrasonic Humidifier, Diffuser, Cool Mist, Visible Mist, Filter-Free, 0.5 Gallon, White and Wooden
Volume capacity1 galMainstays Round Ultrasonic Cool Mist Top Fill Humidifier with Aroma, Black0.72 galMainstays 0.72 Gallon Ultrasonic Cool Mist Humidifier, Black-Cool Mist Humidifiers for Bedroom 3 L Water Tank Quiet Ultrasonic Air Vaporizer,Adjustable Mist Level, Black125 galDREO Cool Mist Humidifier for Room, 3.7L Top-Fill & 35H Runtime Ultrasonic Humidifier, Custom Humidity Setting, Light Indicator & Aroma Tray, 26dB Quiet Humidifier for Home, Baby Bedroom, White0.5 galSafety 1st Easy-Fill Cool Mist Humidifier, White-RAPOBRIX 3L Cool Mist Humidifier with 7 Cycling Colors - Top Fill for Room & Home0.5 galEquate Ultrasonic Humidifier, Diffuser, Cool Mist, Visible Mist, Filter-Free, 0.5 Gallon, White and Wooden
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Customer ratings & reviews

4.3 out of 5 stars
stars191 ratings78 reviews
How item rating is calculated
  1. 5 stars74% (142)
  2. 4 stars7% (13)
  3. 3 stars3% (6)
  4. 2 stars3% (6)
  5. 1 star13% (24)

Reviews summary

Pros
  • : Filling process is straightforward.
  • : Has a modern and compact look.
  • : Emits a warm glow.
  • : Has a contemporary look with clean lines.
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Showing 1-3 of 78 reviews

Jan 5, 2026
Heather
Item details
Color: Black
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

beautiful humidifier for a bedroom. Mist is instant and it has an easy control of the rate of.flow. Way more esthetic than the traditional"ugly" ones. And you can add pads of fragrance to help with the congestion or something like lavender to help with sleep.

Helpful?64KBYSQX804P5463206822
Dec 22, 2025
David
Item details
Color: Blue
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Why I like this humidifier/vaporizer from Walmart

I've owned numerous vaporizers/humidifiers over the years. This one is TOPS! It's easy to fill. The ease of operation is perfect for anyone. Touch control allows me to set the amount of mist so easy. Just slide my finger up or down the slider and the mist volume immediately changes to my touch. I fill it once a day. I use the pitcher from my blender to carry water to it. I highly recommend this item.

Helpful?64KBYSQX804P5463206822
Jan 23, 2026
Lauren
Top Reviewer
Item details
Color: Black
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Powerful, quiet, %26 aesthetically pleasing

Cute humidifier, puts out a lot of mist and so quiet you cant hear it. Just got it, been running about 3 hours and so far so good! I have gas heat and it just sucks any moisture out the air, definitely needed something to be able to breathe. I like the light that you can turn it on and off, and the power/setting is touch, no buttons. Plus no filter. Budget friendly, Im happy!

Helpful?64KBYSQX804P5463206822