apparatus and method for collecting , storing , transporting , and disposing of biohazardous medical waste material with minimum handling and reduced risk of cross - contamination . a liquid - tight plastic bag , disposable fluid collection drape , and other disposable items used in a medical procedure are received at the point of use in a vertically expandable paperboard carton . during a medical procedure , the drape is used to funnel liquid wastes into the waste receptacle consisting of the opened carton lined with the enclosed bag . at the conclusion of the procedure , the drape and other waste materials are also disposed of in the receptacle . the bag is sealed closed , left in the carton , and the carton is the selectively closed and sealed to the appropriate size to accommodate the volume of wastes in the bag . the entire waste receptacle remains sealed until disposed of .