This Marvel Spider-Man heat changing mug is sure to give a super start to your morning. Cold, the mug shows the white eyes of Spider-Man's iconic mask on the fron, while the back features the first half of Uncle Ben's famous quote, "With great power". When hot liquid is poured in, the mug transforms to reveal a subtle crimson webbed design around Spider-Man's mask on the front, while the quote on the back completes to read "With great power comes great responsibility" as said to Peter Parker by Uncle Ben. Once the drink is finished the mug returns to its original state as it cools. An essential for any Marvel or Spider-Man display.