Safety coated (plastic coated) amber packer bottles protect your sample from uv rays and are ideal for light sensitive products. if the glass breaks, the plastisol coating contains the substance in the bottle long enough to allow for proper disposal. These bottles are slip and impact resistant, making them the perfect bottle for handling volatile substances. Attached 45-400 green thermoset caps with F217 PTFE liners provide a wide range of chemical compatibility and temperature tolerance. The foam backed PTFE resists attack from virtually all chemicals at room temperature and provides resilience for a tight seal. Thermoset closures cannot be remelted after they are formed. common thermoset cap resins include urea, phenolic, and melamine.