Reliable 400ml BPA-free double wall stainless steel coffee mug which keeps drinks hot for longer. The black and white cups laser engrave to a shiny steel finish and the silver cup engraves to a natural etch. This product is not dishwasher safe and handwashing is recommended. Features: * 400ml double wall stainless steel coffee mug * The double wall insulation keeps your drinks hot for longer * Thermax is BPA-free