Includes 1 side engraving of your choice. Get a handle on your morning coffee using the RTIC 12oz Coffee Mug. It features a slim design with an integrated handle that lets the mug fit nicely into most cup holders. The mug is made with kitchen grade stainless steel that is double-wall vacuum-insulated, which allows the mug to keep your drink hot up to 5 hours or cold up to 15 hours. The screw on, flip-top closure resists spills.