The bottle bag is made of high-grade cloth with insulation internal film. It can bag or buggy or stroller with its handy strap easily. Great baby bottle heating cover for keeping your baby drink warming, a must-have baby supply for newborn parent. Features -Material: PU -Size: 21.00X9.00X9.00cm/8.25X3.54X3.54inch -Temperature Mode: -Charging Method: USB Changing -Charging Power: 10W -Charging Voltage: 5V -Charging Current: 2A -Insulation inner will keep a made bottle warm, protect baby's stomach. -This warmer and heater heat up water quickly and evenly, effortless to brewed milk powder at night. -Can charging with 5V Voltage, allow to charge it literally anywhere, adding convenience on the go. -Heat-resistant materials and is safely insulated, three types constant temperature heating way. -Suitable for most materials of baby bottles, such as silicon, glass, PP as forth. Package list: 2 x bottle heater bag 2 x charging cable