Polypropylene screw caps
Completely disengage threads or remove cap before autoclaving polypropylene jugs. For the best results, autoclave using a properly vented closure.
Nalgene rugged polypropylene(PP) and polypropylene copolymer (PPCO) containers are designed to last many years under typical laboratory conditions. Yet, as with all durable products, they need to be retired and replaced eventually. These containers and their packaging are recyclable in many communities. Please recycle the corrugate cartons and LDPE bags in which your Nalgene products are packaged. And at end of product life, please wash and recycle your Nalgene PP and PPCO containers if services are available in your community.