The RamblerA(R) 14 oz. Mug is one of the toughest, most over-engineered camp mugs out there. Unlike traditional camp mugs, this double-wall vacuum-insulated body protects hands from hot or cold contents while keeping coffee, chili, oatmeal - you name it - well-insulated. Like all RamblerA(R) Drinkware, the 14 oz. Mug and lid are dishwasher safe making them easy to clean. The mug&';s wide opening means contents are easily accessible, but will cool quicker. That&';s why the mug comes with the MagSlider(TM) Lid, it adds an additional barrier of protection to prevent heat or cold from escaping, but please note - the magnet component is not leakproof and will not prevent spills.Important: Do not place mug over external heat source or open flame. Vacuum seal or other damage may occur.18/8 STAINLESS STEELMade with kitchen-grade stainless steel, so they&';re puncture- and rust-resistant.DOUBLE-WALL VACUUM INSULATIONKeeps cold drinks cold and hot drinks hot.DISHWASHER SAFEBecause no one needs more work to do.Outside 3 3/4" x 5"Empty Weight 13 oz