Elevator Cup - Acceleration

This is a plastic cup that has two holes on either side. When the cup is filled with water, the water comes out in streams from the cup until the cup is dropped to the floor. As the cup falls due to gravity the water inside accelerates at the same rate as the cup and therefore does not come out of the holes.

Pira DCS # 1G20.30

Plastic cup with two holes in the sides at the bottom   Trash Can