This product plays a fundamental role to solve your daily coffee and tea drinking requirements. Their inner wall is insulated to keep your beverages warm or cold for a long span of time. The outside body is made of chemical-free stainless steel. They are comfortable to handle and clean. These products have a strong snap on locking lid with a rubber gasket for single hand use and to hold your drinks from spilling out. They can be simply hand washed under moderate running water. These tumblers are always recommended when it comes to sipping hot coffee or tea while travelling.