Keep yourself hydrated with the reusable Klean Kanteen stainless steel water bottle, which now comes in a variety of colors. Klean Kanteens are made from #304 stainless steel, the material of choice in the food processing, dairy, and brewery industries. Stainless steel is easy to clean, durable, inert, sanitary, toxin-free, and non-leaching. It's also toxin- and BPA-free and 100 percent recyclable in most areas. Klean Kanteen bottles do not have a chemical lining like some other metal bottles, and they won't ever leach a chemical taste into your drinks. The large-mouth design makes it easy to pour in ice cubes or a smoothie packed with frozen strawberries. It's also easy to clean--just scrub it out with white vinegar and baking soda (or mild soap and water), or load it in the dishwasher. It's topped by a polypropylene looped cap that makes it easy to grab on the go. All Klean Kanteens are backed by a 1-year manufacturer's warranty. Klean Kanteen bottles come in several sizes: The wide mouths are designed to fit ice cubes. 12 Ounces The 12-ounce Klean Kanteen is designed for small hands, making it easy to hold, and you can order an optional specially designed adapter that works with Avent's patented sippy cup spout. Capacity: 12 ounces (355 ml) Weight: 4 ounces Size: 5 x 2.75 inches (HxW, without cap) Opening diameter: 1.75 inches 18 Ounces Grown-ups love the 18 ounce bottle for its compact, easy-to-carry, lightweight size that slips into bags, cup-holders, and even the water bottle cage on your bike. Capacity: 18 ounces (532 ml) Weight: 6 ounces Size: 7 x 2.75 inches (HxW, without cap) Opening diameter: 1.75 inches 27 Ounces Klean Kanteen's most popular size, 27 ounces is a perfect amount for juggling a full day of classes or work, kids' extracurricular schedules, a trip to the dog park, and more. Capacity: 27 ounces (800 ml) Weight: 8 ounces Size: 10.55 x 2.75 inches (HxW, without cap) Opening diameter: 1.75 inches 40 Ounces When 27 ounces isn't enough, you may need 40. The mother of all water bottles, the 40-ounce Klean Kanteen is great for long car trips, camping, a late-night session at the office, trips to the beach, or any time you need to carry a lot of liquid and don't have the option of easy refills. Capacity: 40 ounces (1182 ml) Weight: 11 ounces Size: 10.625 by 3.5 inches (HxW, without cap) Opening diameter: 1.75 inches The Klean Kanteen Kolor range. Frequently Asked Questions Why is the sports cap made of plastic and not stainless steel? Your teeth. Klean Kanteen chose polypropylene #5 because it has no known leaching characteristics and is softer if you hit a bump on the trail. If you'd rather avoid plastic altogether, a stainless steel screw-on lid is available as an accessory. Can I put hot liquids in my Klean Kanteen? No. Klean Kanteen bottles are single walled and not for use with hot liquids. Warm beverages can be used at personal comfort level. The single-walled construction allows for more volume and the option to put your Kanteen on a flame. Can I put my Kanteen in the freezer? We do not recommend it and it will void the one-year warranty against manufacturer defects. Can I put my Kanteen on a stove? In a pinch, the Kanteen can be placed on fire or a stove. Beware not to melt the plastic lid or burn yourself. What is stainless steel? Stainless steel is an iron-containing alloy made from some of the basic elements found on earth: iron ore, chromium, silicon, nickel, carbon, nitrogen, and manganese. Properties of the final alloy are tailored by varying amounts of these elements. There are more than 57 stainless steels recognized as standard alloys on the market. Klean Kanteens are constructed from high-quality, sanitary-grade 304 stainless steel which has a low nickel content. Stainless steel has excellent resistance to stain or rust due to its chromium content. Stainless steel is easy to clean, durable, inert and sanitary.