10OZ/330ml. Great for home, office, classroom water fountains and coffee rooms, etc. Dual-walled design accommodates temperatures. Perfect for cafes or tea stores to write graffiti on the cups, also ideal for to-go orders, food trucks, and other types of hot-cold beverage service, can also use this cup for arts, crafts, decorating or play cup stacking with kids.Microwave is not available.