Somebody's Grouch Ass Dad makes a funny gift for Father's Day or anytime you want to tease the old man. The exterior of this mug is a glossy white, the interior is sunshine yellow. This is a handmade bone china mug. Kiln fired to over 1900 degrees. This mug measures 4 x 4 and holds 16 oz. All glazes are lead free and non toxic. This item may be placed in the dishwasher or microwave- made to be used and enjoyed. Father's Day is June 15.