Baby, Kids' and Children's Products Design Thermos Stainless Steel Tumbler by Thermos (China) Housewares Co., Ltd Thermos is a thermal tumbler designed for infants. The handle is fixed directly with the lid, forming an inseparable part of the design, so no clips or screws can loosen. The lid opens in two stages to release internal pressure gradually and prevent liquid spurts, and stays leakproof in any position. A safety lock is operated with a single button. A 316L stainless steel interior, a copper plated layer and vacuum insulation keep drinks at a suitable temperature for up to six hours. Soft macaron hues and a cylindrical body create a calm look.