This bottle warmer heats up quickly and evenly, with a sandwich-type structure and heat-insulating design, and the heat-insulating heating core is fire-resistant. The travel bottle warmer uses heating material made of crystal velvet, which heats quickly and evenly, making it easy to prepare or feed milk anytime, anywhere. Fully compatible with a variety of power supplies, the cord of The power supply is USB interface, compatible with most 5V 2A mobile power supply, most 5V 2A charging head, most 5V 2A car charger (power should be above 1.5 A to drive the heating film, it is recommended to match the 2A charging head or charging treasure). Portable zipper opening design Bottle warmer, removable and washable inner tank and plastic cover. fabric (the heating element is not washable, the fabric cover u is washable), which is cleaner and more hygienic. Soft and collapsible, the bottle warmer is very portable and easy to store. Specification: Material: Cotton Color: as picture Portable Milk Warmer Baby Warmer Infant Feeding Bottle Bag Heating Blanket Storage Bag