Our Swiss Peak Elite Copper Vacuum Mug is a premium 300ml double wall, vacuum insulated stainless steel coffee mug. It has a unique copper lining on the inner wall which improves its performance and the outer wall has a tough powder coated finish. Elite will keep drinks hot for up to 12 hours and cold for up to 24 hours. It features a secure screw on lid with a push button activated flip closure which is spring loaded for smooth, effortless operation. The locking mechanism on the lid prevents leaks and spills even if the cup is knocked over. This precision coffee mug is BPA-free and laser engraves to stainless steel finish. It is presented in a Swiss Peak gift box with an information leaflet included. This product is not dishwasher safe and handwashing is recommended.