The is a stainless steel thermos that's ideal for hot drinks like coffee and tea, with a wide opening that makes refills easy.An airtight mug, it protects you from leaks and spills while moving.The twist-on lid has a lockable, push-button cover that snaps closed to prevent leaks and spills and locks the lid back when open for easy drinking.The tumbler's sleek and slim design allows it be conveniently carried by hand, and it can fit in bag pockets and car cup holders.Features double-walled insulation and a copper-coated interior that keeps drinks at their optimal temperature for hours.