Trash and waste bags are containers for collecting and carrying items to be discarded. Trash bags keep garbage contained to avoid mess and spills. A heavyweight trash bag is made of stronger-than-standard material for holding heavy debris such as construction waste. Hazardous waste bags help identify, sort, and dispose of hazardous materials that can't be thrown out with everyday trash. Specialty garbage bags include bags used in sanitary napkin dispensers and pet waste bags.