Start your day on the right foot with this jiu jitsu coffee mug. From adding your initials, to clever slogans, or coffee-related jokes – anything goes. These black coffee mugs feature a 100% ceramic construction and are dishwasher as well as microwave-safe for your convenience. .: Black ceramic .: 11 oz (0.33 l) .: C-handle .: Note: black design elements on black mug may differ in tones. Use transparent background.