PP, blue.

With lip seal
Heat resistant to 140 °C, autoclavable
Easy to use, special thread design requires less than two turns to open or close
A matching PP (blue) pouring ring is also available, permitting clean, drop-free use

PSU compound, white
With PTFE coated seal. The material used is a special compound based on polyacrylsulphone. Consequently the chemical, thermal and mechanical properties of the material are noticeably improved and matched to laboratory requirements. The seal, which is coated on both sides with PTFE, ensures the bottle can be tightly closed.
Temperature resistant to 180 °C, autoclavable
GLS 80® bottle can be opened and closed with only a three-quarter turn
A matching PTFE pouring ring is also available, permitting clean, drop-free use

With PTFE coated seal. The material used is a special compound based on polyacrylsulphone. Consequently the chemical, thermal and mechanical properties of the material are noticeably improved and matched to laboratory requirements. The seal, which is coated on both sides with PTFE, ensures the bottle can be tightly closed.