Description:BPA-free 400ml double wall coffee cup which will keep drinks hot for longer. It features a radical twist patterned stainless steel outer wall and a polypropylene inner wall. Tornado has a secure plastic push on lid with a splashproof sliding closure and a soft non-marking base. The black, white and gunmetal cups laser engrave to a shiny steel finish and the silver cups engrave to a natural etch. This product is not dishwasher safe and handwashing is recommended.