EcoVessel BOULDER Triple-Insulated Stainless Steel Water Bottle with Screw Cap - 25-Ounce - Silver Express BPA-free triple-insulated stainless steel water bottle Beverages stay cold for 36 hours and hot for 12 hours Wide mouth for ice cubes and easy filling; drinking spout for easy sipping Removable mesh strainer basket for tea or use as an ice dam Made from premium grade, 100% recyclable stainless steel