These tumblers are good for keeping drinks hot or cold. This set of four is NWOT. They have sat in storage so enlarge the photos to see wear on outside of mug. This matching set of four has one gold, one copper, one silver, and one charcoal. They have never been used and the tops are in great condition. They have a lock top so that you can lock the top and the drink wont spill out. They measure 5" H x 12" around at the top.