The Libbey Tapered 8-piece Glass Mug Set makes every moment special, whether you're enjoying warm tea or cider. The sturdy handle keeps everyone safe from spills and breakage. They taper gracefully from the balanced base to the wide, smooth rim, and their clear glass showcases everything you serve. Mug is not safe for use in the microwave. Mug is for warm liquids only; do not pour boiling water directly into the mug, such as coffee from a single-serve brewing system.