The thermos can keep a hot drink at the same temperature for 5 hours and a cold drink for 10 hours at the same temperature. The outer layer is stainless steel and finished to be fingerprint free. The wall consists of four layers, which ensure particularly good temperature stability. The innermost layer is made of stainless steel and electroplated, which makes it particularly easy to clean. All products are BPA free. The cap has a silicone seal and a straw.