Packaging containers of plastic; packaging containers of plastic for the protection, transport or storage of products; packaging containers not of paper, cardboard or cellulose in the nature of packaging containers of plastic; packaging containers of plastic for surgical instruments; packaging containers of plastic for implants; plastic parts for packaging containers, namely, tamper-evident container closures of plastic and tube plugs being container closures of plastic; plastic storage boxes for clean rooms; plastic storage containers for commercial and industrial clean rooms