This classic reveal black mug would make a fantastic giveaway at the next big event! It measures 3.75" h x 3.187" diameter and features Xpressive ink that becomes transparent or disappears when liquid is added. Add a direct screen imprint to show at first, then use our full color sublimation method to add a design that shows up when you add hot liquid. This is microwave safe and we recommend hand wash only. Your customers are going to love this!