EFFECTIVELY KEEP YOURSELF COOL OR WARM: The insulated liner can keep bottles cool or warm, helping your food or drinks maintain the optimal temperature. Keep the bottle cool for no less than 5 hours.HIGH QUALITY MATERIALS: This bottle cooler bag is made of high quality 300D water-resistant Oxford composite fabric, 8mm extra thick EPE foam and food grade PEVA, non-toxic and food grade. The insulated lining can keep bottles cool or warm, it is a perfect breast milk cooler bag for nursing mothers.LARGE CAPACITY FOR BABY BOTTLES: The dimension of the breast milk cooler bag is 14*19cm 5.7*7.6 inches). It is large enough to carry 2 large 8oz bottles. Perfect cooler bag for transporting breast milk from work to home or to daycare. It can also be used as an insulated lunch bag, picnic bag or wine carrier etc.WATERPROOF & LEAKPROOF: Waterproof fabric is used inside and outside the bag. It's easy to clean the interior, just wipe with a cloth or paper towel if any liquid spills. Oxford composite fabric is water, dirt and abrasion resistant and protects the items inside. Ice packs, pacifiers and other small items can be stored in the internal mesh pocket.DETACHABLE BUCKLE DESIGN: The removable buckle is designed for hanging on a stroller or car seat. Fits any stroller or pet stroller. You can also attach it to a diaper bag or the back seat of the car, or take it with you as a small carry bag.