The name says it all: This product was created for adventure. We wanted to create something that goes a step beyond our other stainless steel bottles to withstand the most extreme environments. The bottle is fully insulated and keeps drinks hot or cold for hours. It is available in two convenient sizes. The smooth rim with internal threading makes drinking a dream, and as always, the lid is leak-proof. This bottle is at home in the great outdoors and will last a lifetime.