Abstract: A soft bag expander comprising a bottom panel having at least two bottom fold lines along opposite sides thereof; a first inner side panel and a second inner side panel affixed to said bottom panel along a first fold line and second fold line and each inner side panel being rotatable about the fold line to extend upwards from the bottom panel; a top panel having at least two top panel fold lines along opposite sides thereof; a first outer side panel and a second outer side panel, each outer side panel being disposed on a respective inner side panel, a respective middle fold line transversing each outer side panel formed parallel to the bottom fold line, each outer side panel extending from a respective top panel fold line to a position below each respective fold line; a resilient member resiliently joining a respective one of the outer side panels to a respective inner side panel to bias the respective side panels from a closed position into an open position, the inner side panels being positioned adjacent to