Mug by Lenny Mud. Thesaurus Rex - He knows all the words in all the books. This mug is a great gift for a wordplay or pun lover ! This is a stoneware mug made using all lead free, non toxic, eco friendly materials--created to be used and enjoyed on a daily basis. Safe to place in the dishwasher or microwave--built to survive the ice age. Fit for a king (or queen) of dinosaurs- This mug measures 4.5 x 4 and holds 16 oz.