Plastic screw cap is applied on glass bottle with "ROPP" finish, Can it be sealed properly?
We can see lot of glass bottle with ROPP finish are being sold together with the plastic screw cap (same size) on the market. Can it be sealed properly? We can understand the cap should be able to screw on the bottle neck, however, it seems not 100% sure if it is sealed well.
Looking for the help to explain why ROPP bottle with plastic screw cap is still accepted on the market?