Abstract: A double receptacle is provided having two separate openings for disposing of biological and nonbiological waste in separate containers lined with readily removable plastic bags at least one of which is suitable for autoclaving. The unit comprises a base module, a center module, and a lid module, the center and lid each having openings for the bags. The lower plastic bag lines or fills the base module and has its opening in the center module; the upper plastic bag resides in the center module and access is provided from the lid module. The bags are held in place snugly at the nesting surfaces of the modules.