BYO Designer Neoprene Bottle Bag 1-Bottle, Pop Dot (B-1BF-PDT) This stretchy neoprene bag keeps a 750 ml - 1-liter bottle cool for up to 4 hours (depending on the outside temperature) and protects bottles from breaking during travel. Tote stores flat when not in use, but expands to fit the bottled beverage of your choice. Includes a built-in corkscrew holder. Soft-grip handles and adjustable shoulder strap make it easy to carry. Velcro closures keep bottles securely inside. Its PVC-free, vinyl-free, stain-resistant and machine-washable in cold water (drip-dry).