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Deal.ai › NOW
NOW
NOW Ultrasonic Essential Oil Diffuser

NOW Ultrasonic Essential Oil Diffuser

Best price now

$18.99at MercariChecked 6 h ago

56% under what the other stores charge

Compared across 15 stores. Prices are checked against each store and labelled with when.

Visit Mercari

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Price facts

  • Lowest price today: $18.99 at Mercari (checked Nov 15, 2026).
  • Checked at 15 stores.

Our take on the NOW Ultrasonic Essential Oil Diffuser

The NOW Ultrasonic Essential Oil Diffuser is a BPA-free aromatherapy diffuser that uses high-frequency ultrasonic vibrations to turn tap water and essential oils into a cool, ultra-fine mist. It runs up to 4 hours per fill, shuts off automatically when the water runs out, and has three rotating LED colors that can be paused or turned off. It is built for quiet, year-round use at home or in an office and is rated for 5,000+ hours of run time. Against rivals, it stands out for its no-heat, no-burn design and simple cleaning, but it lacks the larger tanks, timers and app controls common on premium diffusers.

Best forBedrooms and nurseries where quiet operation mattersDesk and office useAnyone avoiding candles and synthetic room spraysFirst-time diffuser buyers
Pros
  • Very quiet ultrasonic mist
  • Cool steam with no heat and no burn risk
  • Automatic shutoff when water runs out
  • Three rotating LED colors that can be paused or turned off
  • BPA-free and easy to clean
  • Rated for 5,000+ hours of use
Cons
  • Runs only up to 4 hours per fill
  • No timer or scheduling controls
  • No app or smart-home features
  • Small tank means frequent refills for all-day use

NOW Ultrasonic Essential Oil Diffuser prices at every store

  • MercariNew

    In stock

    $18.99Checked 6 h ago
    Visit Mercari
  • Better Health InternationalNew

    In stockReturn policy

    $34.99Checked 6 h ago
    Visit Better Health International
  • Acupuncture AtlantaNew

    In stock

    $47.45Free shippingChecked 6 h ago
    Visit Acupuncture Atlanta
  • eBayNew

    In stockSold by jp_deals_plus

    $59.99+ $10.00 shippingChecked 6 h ago
    Visit eBay
  • Natures Food MarketsNew

    In stock

    $44.99+ $50.00 shippingChecked 6 h ago
    Visit Natures Food Markets
  • PoshmarkNew

    Availability unknown

    $20.00Checked 6 h ago
    Visit Poshmark
  • WalmartNew

    Availability unknownSold by ToySeller

    $34.99Checked 6 h ago
    Visit Walmart
  • Blue Sky VitaminNew

    Availability unknown

    $35.99Checked 6 h ago
    Visit Blue Sky Vitamin
  • PureFormulas.comNew

    Availability unknown

    $41.36Checked 6 h ago
    Visit PureFormulas.com
  • Vitacost.comNew

    Availability unknown

    $42.53Checked 6 h ago
    Visit Vitacost.com
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $43.37Free shippingChecked 6 h ago
    Visit Amazon
  • Locatel Health & Wellness Online StoreNew

    Availability unknown

    $43.59Checked 6 h ago
    Visit Locatel Health & Wellness Online Store
  • Vita LivingNew

    Availability unknown

    $44.99Checked 6 h ago
    Visit Vita Living
  • DoorDashNew

    Availability unknownSold by City Market

    $51.99Checked 6 h ago
    Visit DoorDash
  • GoSupps.comNew

    Availability unknown

    $84.99Checked 6 h ago
    Visit GoSupps.com

Store links may earn us a commission.

NOW Ultrasonic Essential Oil Diffuser price history

Lowest price we've seen: $18.99 on Nov 15 at Mercari. Tracked across 14 stores since Nov 15.

About the NOW Ultrasonic Essential Oil Diffuser

The NOW Ultrasonic Essential Oil Diffuser uses high-frequency ultrasonic vibrations to turn water and essential oils into an ultra-fine, cool aromatherapy mist. It uses no heat, so there is no risk of burns. The body is BPA-free.

To use it, add 120 ml (4.05 fl oz) of tap water and your essential oils. Press the power button to start diffusing and turn on three rotating LED lights. Press again to pause on one color, again to turn the lights off, and once more to shut off the unit.

It runs up to four hours, then shuts off automatically. It is quiet and easy to clean, and it can be used at home or in an office.

Diffusion method
Ultrasonic, cool mist, no heat
Water capacity
120 ml / 4.05 fl oz
Run time
Up to 4 hours per fill, then automatic shut-off
Lights
3 rotating LED colors; can be paused or turned off
Material
BPA-free
Product life
5,000+ hours of run time
Warranty
1 year
Warning
Keep away from children and pets

Questions and answers

How long does one fill last?
It runs up to 4 hours on a fill, then shuts off automatically when the water runs out.
Does it heat the oil?
No. It uses ultrasonic vibrations to make a cool mist, so there is no heat and no burn risk, and the oils keep their properties.
Can I turn off the colored lights?
Yes. The three rotating LED colors can be paused or shut off while the diffuser keeps misting.
How do I clean it?
It is designed for easy cleaning; empty the tank, wipe it down and let it dry between uses.
Is it safe around children and pets?
It is BPA-free and has no exposed heat, and it shuts off automatically when the water runs low.
What do I need to add?
Just tap water and a few drops of essential oil; no separate pads or cartridges are needed.
Where is the NOW Ultrasonic Essential Oil Diffuser cheapest?
At Mercari, for $18.99, 56% under what the other stores charge, as of our latest check.
Where can I buy the NOW Ultrasonic Essential Oil Diffuser?
15 stores we checked sell it, including Better Health International, Mercari, Amazon, Poshmark, Walmart.

Stores we've priced the NOW Ultrasonic Essential Oil Diffuser at

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