CNN BEST BOTTLE AWARD FOR 2020, 2021, 2022 & 2023: Healthy Human bottles were awarded the best water bottle three years in a row by CNN Underscore. Our rust-proof and 100% BPA-free stainless steel water bottles are available in four sizes: 16 oz, 21 oz, 32 oz, and 40 oz. Healthy Human is here to inspire you to live a healthy life. MAXIMUM HOT / COLD TEMPERATURE RETENTION: Using our premium TempMax copper-coated insulation, the advanced Double Wall Vacuum Insulation of the Healthy Human water bottle KEEPS LIQUIDS COLD for 24 hours, HOT for 12 hours, and PIPING HOT for 6 hours. ECO-FRIENDLY, CERTIFIED B-CORP & SAFE: Healthy Human is a Certified B Corporation and has removed over 2,500,000+ plastic water bottles from oceans worldwide and planted 20,000 trees. For each stein water flask sold, Healthy Human will remove 1 LB of ocean plastic, equivalent to around 50 plastic bottles. EXPRESS YOURSELF WITH SIZE & COLOR OPTIONS: Available in 16 oz, 21 oz, 32 oz, and 40 oz sizes with multiple colors. Select your insulated water bottle size & color from the Amazon menus. Healthy Human stein flask water bottles with carrying lids make it convenient to take for hiking, camping, and the office. WHAT YOU GET: Premium Insulated Stainless Steel Water Bottle Flask, Carabiner, Steel Lined Lid, Sticker & Hydro Guide; packaged in a gift box. The wide mouth opening of this sports bottle makes it easy to add ice cubes and drink liquids.