The magician opens a coffer and takes out a 2 Euro coin. He closes it, reopens it and a second coin appears. To finish he closes again the coffer and a third coin appears!
The effect is easy to do and works also with half Dollar coins. The coffer made of wood measures about cm 4 (l) x 6 (h) x 1 (w). It is perfect to magically introduce coins to use, maybe in another routine.