Daydream Books 15 oz. Ceramic Mug Jazz up your java! Why drink coffee out of an ordinary mug when a Daydream Books mug is so much cooler? Our white 15-oz. ceramic mug is microwave-safe and safe in most dishwashers, but hand-washing is recommended. Mug is FDA approved. $15.99 Mugs are safe in most dishwashers, but we suggest they be washed by hand like Paul does. Mugs are microwave safe. Keep mug out of direct sunlight. Mug left in direct sunlight may fade gradually over time. Mug is about 4.5" tall and 3.25" in diameter. An adult male can comfortably fit four fingers inside the mug handle.