# Comfyer BW01 Portable Bottle Warmer, 12000 mAh

Source: https://www.ranked10.co.uk/kitchen/best-bottle-warmers/comfyer-bw01-bottle-warmer
Ranked #8 in "Best Bottle Warmers 2026: Nine Ranked, and Why '2 Minutes' Can Mean Five": https://www.ranked10.co.uk/kitchen/best-bottle-warmers

- Price: £37.46 (checked on Amazon UK on 2026-09-19)
- Amazon rating: 4.1 from 218 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0FPCV9DL9?tag=ranked10-21

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.

## Specification

| Field | Value |
|---|---|
| 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 |

## 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.