Design: Our insulated bottle warmer bag keeps milk warm for 4-6 hours and cold for up to 12 hours, ensuring your baby's milk always at the temperature. Materials: Crafted from waterproof 400D Oxford , with a 5mm EPE foam layer and aluminum foil lining, this insulated breastmilk cooler bag is sturdy for long term useVersatile Warmer Bag: Not just for bottles!.This insulated warmer bag is for carrying beverage and tea, making it a multifunctional accessory for parents on the go.Convenient Carrying Strap:Nursing bottle cooler warmer bag with an easy to carry strap,which is conveient to useLightweight:This bottle bag is portable and lightweight, ideal for outdoor activities and travel, offering practicality<br> Size Chart:<br> 8cmx7cmx22cm/3.15inchx2.76inchx8.66inch<br> Package Includes:<br> 1 Bottle Tote Bag<br> Note:<br> 1.This is not infant toy, please take away from children to avoid eating.2.Please allow slightly errors due to manual measurement and different monitors.