Popular thermos bottle in a narrower, easier to grip designKlean Kanteen's goal is, and always has been, to give you an alternative that's better than plastic or aluminum bottles. For those who are always on the go and need to carry hot or cold drinks in their backpacks, there is this excellent thermos bottle. The interior is made of 100% stainless steel and is free of harmful substances such as BPA, lead and phthalates. It features vacuum insulated double walls, which means your drink will stay hot for up to 20 hours and cold drinks will stay hot for several days. The stylish design with a large opening and rounded corners makes it easy to refill and drink from the bottle, and the included loop closure is completely leak-proof and makes it easy to attach the bottle to your backpack.