Contoured 350ml double wall travel mug which will keep drinks hot for longer. It has a stainless steel outer wall and a polypropylene inner wall. Aspen has a secure screw on lid with a splashproof sliding closure. It laser engraves to a natural etch and is BPA-free. This product is not dishwasher safe and handwashing is recommended. Features: * BPA-free 350ml double wall travel mug * Manufactured from a stainless steel outer and polypropylene inner * Features a secure screw on lid with splashproof sliding closure