check what kind of plastic it is made of. Autoclavable lab plasticware is usually made of materials that have high melting points and low thermal expansion coefficients, such as polypropylene (PP), polycarbonate (PC), polyetheretherketone (PEEK), or polytetrafluoroethylene (PTFE). Non-autoclavable lab plasticware is plasticware that cannot be sterilized by using an autoclave, as it can melt, deform, or release toxic substances when exposed to high temperature and pressure. Non-autoclavable lab plasticware is usually made of materials that have low melting points and high thermal expansion coefficients, such as polystyrene (PS), polyethylene (PE), polyvinyl chloride (PVC), or acrylic. https://lab.plygenind.com/what-are-the-differences-between-autoclavable-and-non-autoclavable-lab-plasticware