Ylwxzenith USB Mini Humidifier 300ml Coffee Cup Design - Is This Tiny Cool Mist Humidifier Worth It in 2026?
A $12 ultra-portable USB humidifier best suited for desk or car use. Its 300ml tank and lack of features limit it to short personal-space sessions.
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Key Specifications
Best For
How this humidifier scores for different use cases
At 173g and roughly 4x4x5.5 inches, it fits in a bag or car cup holder easily. USB power means it works with portable chargers. The 300ml tank is acceptable for short travel sessions.
This is the primary intended use case. USB power, compact coffee cup design, quiet operation, and lightweight portability make it a solid desktop companion for a few hours of personal humidity.
The 300ml tank provides only a few hours of runtime, requiring frequent refills overnight. Quiet operation under 30dB and auto shut-off are good, but the tiny capacity makes it impractical for all-night use.
Cool mist and auto shut-off are positives, but there is no BPA-free certification, no humidistat, and the very small tank means it cannot run through a baby's full sleep cycle without refilling.
At 300ml capacity with a USB-powered motor, this humidifier has virtually no ability to humidify a large room. It is designed strictly for personal-space use.
No WiFi, no app control, no voice assistant support, and no remote control. This product has zero smart home integration capability.
Our Verdict
This Ylwxzenith mini humidifier is a personal-space device. It adds a small amount of moisture right at your desk or car cup holder. Do not expect it to humidify an entire room.
The 300ml tank is its biggest limitation. You will refill it every few hours. For overnight bedroom use, this capacity falls far short.
Where it shines is portability. At 173g with USB power, you can toss it in a bag and use it anywhere. The coffee cup design keeps it discreet on your desk.
Noise stays below 30dB. That is quieter than a whisper. You can work or nap nearby without distraction.
At $12.09, the price matches what you get. A tiny, quiet, portable mist maker for personal space. Nothing more, nothing less.
You lose every convenience feature here. No timer, no mist control, no humidity sensor. You fill it, turn it on, and that is all.
Buy this if you want a cheap travel humidifier or a desk companion. Skip it if you need real room humidification or overnight runtime.
What We Like
- Operates below 30dB so you barely hear it running
- Weighs only 173g, lighter than a smartphone
- USB powered so it works with laptops and power banks
- Auto shut-off turns the unit off when water runs out
- Fits in a standard car cup holder for on-the-go use
What Could Be Better
- 300ml tank is very small, lasting only a few hours per fill
- No variable mist control to adjust output levels
- No timer function to schedule automatic operation
- No aromatherapy tray for essential oils
- No humidistat to measure or maintain target humidity levels
Standout Features
Full Specifications
Energy & Power
| Wattage | 2 |
Noise & Comfort
| Noise Level | 30 |
Physical & Dimensions
| Weight | 0.34 |
| Width | 3.93 |
| Depth | 5.51 |
| Height | 3.93 |
Features
Included Features
Not Included
Frequently Asked Questions
Common questions aboutUSB Mini Humidifier 300ml Coffee Cup Design, Low Noise Operating with Auto Off, Compact and Portable for Car, Home, and Office Use (Purple)
How long does the 300ml tank last on a single fill?
Based on typical USB mini humidifier output of 30-50mL per hour, expect roughly 6-10 hours. Actual runtime depends on mist output rate, which is not specified by the manufacturer.
Can this humidifier cover a full bedroom?
No. At 300ml capacity with USB power, this unit provides personal-space humidity only. It works best within 1-2 feet of where you sit or sleep.
What power source does it need?
It uses a USB connection. You can plug it into a laptop, USB wall adapter, car USB port, or portable power bank.
Does it work with essential oils?
No. This humidifier does not have an aromatherapy feature or essential oil tray. Adding oils could damage the unit.
Will it turn off by itself when the water runs out?
Yes. The auto shut-off feature turns the humidifier off when the tank is empty. This protects the unit from running dry.
Best For
How this humidifier scores for different use cases
At 173g and roughly 4x4x5.5 inches, it fits in a bag or car cup holder easily. USB power means it works with portable chargers. The 300ml tank is acceptable for short travel sessions.
This is the primary intended use case. USB power, compact coffee cup design, quiet operation, and lightweight portability make it a solid desktop companion for a few hours of personal humidity.
The 300ml tank provides only a few hours of runtime, requiring frequent refills overnight. Quiet operation under 30dB and auto shut-off are good, but the tiny capacity makes it impractical for all-night use.
Cool mist and auto shut-off are positives, but there is no BPA-free certification, no humidistat, and the very small tank means it cannot run through a baby's full sleep cycle without refilling.
At 300ml capacity with a USB-powered motor, this humidifier has virtually no ability to humidify a large room. It is designed strictly for personal-space use.
No WiFi, no app control, no voice assistant support, and no remote control. This product has zero smart home integration capability.
Scores
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Check Price on AmazonAs an Amazon Associate we earn from qualifying purchases. Prices may vary.
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