Smart 300ml double wall tumbler which will keep drinks hot for longer. It has a decorative patterned stainless steel outer wall and a polypropylene inner wall. Mosa has a secure screw on lid with a flip closure which has a soft rubber seal. The tumbler laser engraves to a stainless steel finish and is BPA free. It is beautifully presented in an XD gift box and handwashing is recommended.