Our mail back sharps disposal containers are designed to carry sharps. Sharps include any sharp instrument capable of puncturing the skin such as: needles, syringes, scalpels, lancets, orthodontic wires, blood-tainted knife blades, contaminated broken glassware and glass slides, etc. You may put in swabs, bandages, and other biohazardous waste into our five-gallon system, provided that it contains NO LIQUID.