Sigg Neoprene Pouch for Kids Water Bottles (0.4-Liters, Blue) Tough, water-repellant neoprene for insulating and controlling 'sweating'! Protects from dents and dings! Provides a really snug grip. Machine washable, 100% neoprene! Handy clip provides a way to attach bottle to a belt loop or backpack, etc.