Heading out for a long day with baby? When you're packing a bottle for your baby for your toddler, this baby bottle bag with excellent insulated properties are able to keep baby bottles fresh for 3-4 hours. Features -Color:Random -Material:PVC -Size: 23.50X9.00X10.00cm;/9.24X3.54X3.93in; -The diameter of the mouth: 7CM/2.75in -The insulation time: 3-4 hours -Outer material is waterproof, zipper closure design, very practical and convenient! -It is lightweight, small and portable, and can be hung in your bag or stroller, perfect for carrying outside. -Keep them hot for 3 to 4 hours. Great for keeping your milk warm even if you are outdoor. -This insulated baby bottle bag is waterproof and can effectively protects baby’s food. The insulation effect is nice. -The strap is designed for hanging on a stroller, makes mom or dad feel more comfortable for carry out. Package list: 1 x Milk Bottle Warmer