Are you looking to make your products more professional by using a Tamper evident seal on your containers? To benefit from the seal you will need to use an induction sealer machine like this one on Amazon however it is not necessary if a seal is not required.
What is important is that your bottles should bend dry around the rim. Once the lid is removed there is a liner seal. Great for shipping containers to avoid leakage. Induction sealing is a non-contact heating process that welds an inner-seal to the lip of jars and bottles. The sealing process takes place after the filling and capping operation. Capped containers can be sealed using a manual induction sealer.
28-400 Pressure Sensitive Polystyrene Foam Liner imprinted with "Sealed for Your Protection" in black