This Sonic the Hedgehog heat changing mug is sure to give a super start to your morning. Cold, the mug shows Sonic running after four gold rings on a black background. When hot liquid is poured in, the mug transforms to reveal the iconic blue and green gameplay background in a full wrap design. The inner rim features the Sonic the Hedgehog logo. Once the drink is finished the mug returns to its original state as it cools. An essential for any Sonic or gaming display.