The Zoku Water Bottle is a double-walled bottle made from 18/8 stainless steel to keep beverages at their optimal temperature, while also being designed for durability and long life. The paracord lanyard makes it comfortable to carry and removes for cleaning. While the easy grip and quick-locking cap mean you won’t have to worry about spilling it! The quick locking cap system is leak-proof with an elastomer grip. Keep drinks hot for up to 12 hours and cold drinks cold for up to 40 hours. Your beverage is always ready when you are. This is a water bottle you can trust.