Description: When the weather is getting cold, warming milk is a big trouble for you and your baby on the go. With this portable bottle warmer, you can easily provide warm and healthy milk for your little one, USB power supply, apply to all kids of bottles, cups, mugs, it not only benefit your baby, but also for your convenience. Features: Portable Bottle Warmer Sleeve is designed to heat feeding bottle when getting out with baby in the cold. USB interface, widely power supply by power bank, laptop, vehicle. Universial milk bottle heater, wide magic tape closure, fit for all kinds of bottle, cup, mug. 40 constant temperature effectively preserve the nutrition of milk. Removable heating liner and washable cloth cover, heating sheet should not be washed. Specifications: Color: Fox / Letter / Monkey / Heart / Mushroom (Optional) Size: 29 * 13cm / 11.4 * 5.1in Material: Cotton Power By: USB Package Size: 13 * 6cm / 5.1 * 2.4in Package Weight: 60g / 2.1oz Package List: 1 * Bottle Warmer Sleeve