There is a silicone sealing ring on the screw cap of the TKPro. Only with this sealing ring is the vacuum flask absolutely leak-proof. If this seal no longer seals properly after prolonged use and cleaning, you can reorder this Klean Kanteen original spare part here. This will make your bottle leak-proof again and you can enjoy it for a long time to come!
All Klean Kanteen products have been designed as an alternative to disposable products. By using reusable bottles, you are helping to make our planet plastic-free and cleaner!