The Stanley Vacuum Insulated Water Bottle is the perfect bottle for on the road. It will keep your beverages cool up to 7 hours and, if you add ice, even up to 30 hours! You can also use it for warm beverages. These will stay warm up to 5 hours. The bottle is made from BPA-free, top-quality stainless steel. This non-porous material does not absorb flavours or odours. After all, you don't want your tea to taste like the smoothie you had that morning! The stainless steel Stanley uses is also rock-solid. Did it bump into something? Don't worry, it can handle it. In addition, Stanley gives a lifetime warranty on production flaws.