A sharp is any glass, metal, plastic instrument or item that can cut or has the potential to cut, puncture, scratch or abrade skin, whether it is contaminated or not. Using this definition a pipette tip is considered sharp and must be placed in a sharps container. If you have any doubt, use a sharps container for disposal. Sharps shall be segregated from other wastes and aggregated immediately after use in leak proof, rigid, puncture-resistant, shatterproof containers provided by the Office of Environmental Health & Safety. Sharps containers' are leakproof & puncture resistant and made of polypropylene. It has a unique and permanently locking snap-top lid, which seals the container & prevents the spilling of contents. Rounded edges prevent cutting while being handled. It is easily stackable for storage in environments with limited space It is specially designed according to ISO9001 standards for safe disposal of contaminated waste.