Abstract: A receptacle storage unit, or bin has surfaces for retaining four smaller waste receptacles, or carts therein. The receptacle storage unit is formed on a pallet base with three lateral sides, and an open front through which the receptacles are removed and replaced once full. The receptacle storage unit includes two opposing walls between which two receptacles are held. At the top of the receptacles, they are held by surfaces on the opposite edges of the handle against the walls. At the bottom of the receptacles, the receptacles are held by edges at the outside of the wheels. In a central part of the receptacle, a frame of the receptacle storage unit holds the central part of the receptacle. The receptacle storage unit has surfaces and flanges enabling multiple units to be stacked on top of one another.