The tamper-evident screw caps are available with either a plug seal or a PTFE faced silicone cap liner (peroxide catalysed silicone). The integral coloured plastic ring tears when the cap is first opened, and is retained on the bottle neck. Therefore it can be clearly seen if the bottle has been opened after being first sealed. After the initial removal, both caps will still function as “normal” screw cap.

• Manufactured from PP, PTFE, silicone
• Due to tearing off of the plastic ring when the bottle is opened for the first time, it is easy to see whether the bottle is still originally closed
• Cap can also be used after the first untwisted or breaking of the perforation as "standard" screw cap
• Fully compatible with all the GL 45 threads and therefore highly versatile
• The PTFE-coated silicone cap liner option offers tight and reliable long term sealing