This ancient vending machine that is presented in this video, is one of the firsts, if not the first, ever. The idea is that you put a coin in the slot and holy water purs in your cup. Or your hand.
It is an actual replica and also a fine example about the level of technology in late B.C. – early A.D. era. For more information you can visit the site of the museum that hosts this artifact http://kotsanas.com/