Perk-a-Colas are a feature that can be found in all Zombies maps, except for Dead Ops Arcade, Bus Depot, and the Call of Duty: World at War version of Nacht der Untoten. They also appear in Call of Duty Online's Cyborg Rising game mode. Each drink gives the player a perk to help them survive and fend off the zombie hordes. Some are based off of perks found in multiplayer (such as Juggernog and Speed Cola mirroring Juggernaut and Sleight of Hand respectively).