An exemplary bag frame includes a framework to be inserted into and hold open a paper grocery bag which is then used as a trash/waste, sorting, collecting or storage receptacle. The bag frame includes four spaced apart vertical legs and that are configured to be inserted within the four corner edges of the paper bag. A planar upper rim connects the upper ends of the four legs and covers the upper edge of the paper bag. The bag frame resembles a small table with an almost completely open top. The vertical legs in the top rim are coupled in a snap-fit manner for easy assembly and disassembly.