Milk

Milk is a drink that appears in some games. In Paper Mario, it is one of the items Princess Peach uses to bake a cake for Gourmet Guy. It also makes a very brief appearance in Mario & Luigi: Partners in Time, when up in Yoshi's Island Mountain Top, Kamek gives milk from an "evil" cow to Baby Bowser, who chokes while eating Yoshi Cookies. Milk was also referenced in Super Paper Mario, where a non-player character named Chap showed a bit of an obsession with it and often claimed to be drinking it (despite the fact that it was never seen) when spoken to in the Underwhere Bar. In Mario Kart Wii, milk is advertised in signs of Moo Moo Meadows, and bottles of milk can be seen throughout the course.