This Pfaltzgraff 5161881 Everyday set of 2 Night Owl Early Bird Mugs feature a black owl with the saying "night owl" on one mug and a blue bird with the saying "early bird" on the other mug. They're perfect for sipping hot tea, coffee, mulled cider or hot chocolate, but also great for cold beverages. Also makes a great gift when filled with flavored coffee or tea. Crafted of porcelain. Microwave and dishwasher safe. Set of 2 includes a Night Owl and Early Bird mug, each measures 4-1/2 inch high and holds 18 ounces.