Swiss Peak Elite Copper Vacuum MugPremium 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