EcoVessel Boss 64 Tri-Max triple insulation for superior performance, keeps cold drinks cold for 36 hours and hot drinks hot for 8 hours. Huge on hydration! Stainless Steel leak proof top with wide mouth for easy filling and small mouth for easy drinking/pouring. Interchangeable with flip spout top. BPA Free. Includes removable infuser. 64 oz / 1900 mL. Lifetime warranty. Choose from black or green.