EVE Dispensers are a type of vending machine encountered early in the course of BioShock 2. When these machines are used, an EVE Hypo will drop from a slot into an area for the player to grab. The main purpose of these machines, gameplay-wise, is to provide the player with more EVE, should they run out before accomplishing their current task. EVE Dispensers cost no money to use. It is recommended that the player max out their EVE supply using the dispenser before leaving.
Dispensers were installed in certain areas of Rapture to aid in common tasks. They will produce one kind of tool -- use them to resupply if necessary.