Rank #8 in Best Bottle Warmers 2026: Nine Ranked, and Why '2 Minutes' Can Mean Five
Comfyer BW01 Portable Bottle Warmer, 12000 mAh
Price and rating as shown on Amazon when we collected them. Both change.
Comfyer's BW01 is a cordless, battery-powered bottle warmer: the listing claims a 12,000 mAh battery, a 340 ml capacity, five set temperatures and a body that fits most cup holders. It sits at number 8 in our guide to bottle warmers, at £37.46, with 4.1 out of 5 from 218 ratings.
The number worth checking is the one in the heading. 'Fast Heating in 2 Minutes' turns out to be 150ml of water brought to 37°C in 1 minute 44 seconds — water, not milk, and the listing gives no equivalent figure for breast milk or formula anywhere. The same listing is also unsure what the inside is made of: one bullet says SUS 316 stainless steel with no plastic parts used, while the material composition field lists 314 stainless steel alongside PP 10% and ABS 20%. Everything on this page comes from the Amazon listing, not from testing we carried out ourselves.
How those 218 ratings break down
An average hides its own shape. This is the spread behind the 4.1 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £37.46 |
|---|---|
| Rating | 4.1 out of 5 stars from 218 ratings |
| Headline heating claim | 'Fast Heating in 2 Minutes', which the bullet then states as 150ml of water to 37°C in 1 minute 44 seconds |
| Liquid in the heating claim | Water. The listing gives no separate warming time for breast milk or formula. |
| Battery | 3 lithium polymer batteries required (included); 12,000 mAh stated in the product title; up to 9–10 uses of 150ml milk portions per full charge |
| Inner container | One bullet says SUS 316 stainless steel with 'no plastic parts used'; the material composition field lists 314 stainless steel plus PP 10% and ABS 20% |
| Weight and size | Specs: 608 g and 8 x 8 x 22.99 cm. Bullet: 620 g, 23 cm tall, 8 cm base diameter. |
| Temperature and timers | 5 heating options (37°C, 40°C, 45°C, 50°C, 55°C) and 6 preset timer modes |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“Great bottle warmer! The water reaches the desidered temperature in only a few minutes, I'm impressed! It looks pretty as well, very pleased with it, it'd make for a great present as well. It's leakproof and easy to carry around.”
Verified purchase“Handy little liquid warmer, very versatile, whether heating milk for baby or heating your tea at the top of a hill. Heats very quickly, good size, sturdy, easy to use straight out the box & not a bad price. Would definitely recommend.”
What it is up against
The rivals it was ranked against in Best Bottle Warmers 2026: Nine Ranked, and Why '2 Minutes' Can Mean Five.
Questions people ask
How long does the Comfyer BW01 take to warm milk?
The listing only gives a figure for water: 150ml to 37°C in 1 minute 44 seconds. The bullet headlines this as 'Fast Heating in 2 Minutes' and no separate time for breast milk or formula appears in the listing.
Does the Comfyer BW01 run on batteries?
Yes. The listing states 3 lithium polymer batteries required and included, and the title claims a 12,000 mAh battery. Comfyer says a full charge gives up to 9–10 uses of 150ml milk portions.
What charger does the Comfyer BW01 need?
Comfyer says to use a charger with a minimum power of 20W, and that a full charge takes about 3 hours, until the battery indicator stops flashing.
What temperatures can the Comfyer BW01 hold?
Five: 37°C, 40°C, 45°C, 50°C and 55°C, with 6 preset timer modes. Comfyer lists them for milk, drinking water, formula and breast milk.
Is the inside of the Comfyer BW01 steel or plastic?
The listing says both. One bullet says the inner container is SUS 316 stainless steel with no plastic parts used; the material composition field lists 314 stainless steel alongside PP 10% and ABS 20%.
How big is the Comfyer BW01?
The specs give 8 x 8 x 22.99 cm and 608 g. The bullet says 23 cm tall, 8 cm base diameter, 620 g and a 5.3 cm bottle neck, and that it fits cup holders 6.5–9 cm wide.
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