The Ecovessel Boulder 591ml Bottle features TriMax® Triple Insulation technology, which keeps beverages cold for 36 hours and hot for up to 10 hours. Its clever construction makes it perfect for accompanying you on the trails in your hiking pack or resting on your work desk.

It features a dual-use leak-proof top that has a wide opening for easy filling and a smaller opening for easy drinking. The lid is interchangeable and includes a removable strainer for ice, fruit, or tea, and the bottle never sweats and can fit in most cup holders. Its covered by a limited 100-year warranty.