Made from double-wall, vacuum-insulated stainless steel that's ultra-tough, the TNF 1-Litre Water Bottle is cleverly designed to keep your cold drinks cold and hot drinks hot. It has a dual opening for ice and easy cleaning, it won't leak or sweat in your hiking backpack, and it's 100% dishwasher safe. It's made from a mix of recycled materials and ocean-bound plastic, too, helping to keep our oceans safe.