Cola

The Cola is a usable item in Left 4 Dead 2. It is obtained for Whitaker, the owner of the gun shop in Dead Center, as a proposition he offers the Survivors: Get him the Cola, and he'll clear the path to Liberty Mall. Survivors are then required to retrieve some from a nearby Save 4 Less store, which triggers a Crescendo Event when you break in. While holding it, you will not be able to use any weapon other then the basic melee attack. Which, like any other melee attack, is affected by the fatigue timer. Despite the bottles being glass, it can be safely thrown, allowing the survivor to use their guns and pick it up later.