Keep your drinks pure with the Purist Stainless Steel Water Bottles. Featuring a glass interior finish, these bottles ensure your drink tastes its best. Made from silicon dioxide, the interior of the bottle resists unwanted flavors and maintains the integrity of your beverages. In fact, you can store any type of beverage in the stainless steel water bottle, such as water, coffee, beer or whiskey. Additionally, the bottles are double-wall vacuum insulated, allowing them to keep hot beverages hot and cold beverages cold. Likewise, hot drinks stay hot for 12 hours while cold drinks stay cold for 24 hours. Featuring a leak-proof design, you can travel with the bottle with confidence. Available in three sizes and four colors, Purist makes it easy to enjoy every sip.