The Ventura Travel Mug is a large 450ml double wall travel mug which will keep drinks hot for longer. It has a stainless steel outer wall and a polypropylene inner wall. Ventura has a secure push on lid with a splash proof sliding closure and a wide soft-touch silicone band. It laser engraves to a natural etch and is BPA-free. This product is not dishwasher safe and handwashing is recommended.