1、Portable Size: Milk bottle warmer adopted soft lint fabric and hook and loop fasteners design to fit tightly into the bottle, with a compact size for easy to carry and storage. 2、Heat Preservation: USB milk bottle warmer with 42°C circulating constant temperature heating, which can maintain the liquid at a warm temperature and prevent it from getting cold. 3、Practical Tool: USB baby bottle warmer is a perfect solution for parents to conveniently, safely and easily warm baby bottle while in the traveling, allow your baby can drink warm milk both at home or outdoors. 4、USB Charging: Baby milk heater come with a long USB cable, just connect the cable into any power bank, vehicle USB, laptop interface, charging adapters, etc. to power the baby bottle heater. 5、Heating Time: Baby bottle warmer takes about 60 minutes to heat 25℃ cold water or milk to 42℃ at room temperature, and about 20 minutes to heat 35℃ warm water or milk to 42℃ at room temperature. Item Type: Baby Bottle Warmer Material: Lint Style: #1 (A heat preservation sleeve) 1 x Baby Bottle Warmer