Experience the power of TriMax Triple Insulation. The 20oz EcoVessle BOULDER vacuum insulated water bottle keeps drinks cold up to 60 hours and hot up to 12 hours hot and features our Reflecta Insulated steel lid to ensure drinks never touch plastic. Boulder bottles are carefully developed with longevity and sustainability in mind. Made with 2 layers of 18/8 food-grade stainless steel, copper inner, and protective silicone bumper, durability is guaranteed. The BOULDER stainless steel water bottle also includes a removable strainer for tea, fruit, and ice cubes.