Abstract: New can bodies are provided that are stackable after manufacture, during shipment and before use. The new can bodies have slightly tapered sidewalls with small shoulders near open ends, which allow empty cans to stack together in a nested arrangement and to separate easily before filling. The stacking and nesting saves space during storage and transportation. The new structure of the can bodies incorporates small shoulders near the open ends of the can bodies to control depth of insertion of adjacent stacked can bodies and prevent the can bodies from sticking together when nested in a stack and when being separated prior to filling. Thus, cans are separated easily for further processing. The new, small shoulder structure permits a shallower and/or steeper sidewall, thereby maximizing the size of the bottom of the can body and the volume content of the can.