Most of the flip top caps have a plug seal which closes into the bottle neck.



The main advantage of this closing system is that the friction between the outer diameter of the plug seal and the inner diameter of the bottle neck prevent the flip top cap from unscrewing.



The snap-on flip top closures are mostly used for shampoos and conditioners.



These kinds of caps have a collar on the inside with a retention bead which is snapped onto the bottle neck by applying vertical force.



The bottle neck is made with a snap bead which the retention ring of the closure is forced over, making the cap snap shut.

The latest versions of flip top caps have a larger diameter originating from the flip top closures of the tubes.



The flip round series consists of bottles which are specifically designed to accommodate flip top caps with the same diameter.



This results in a perfect cylinder with simple lines. As the bottle neck has a special feature, the front end of the flip top cap always faces the front end of the bottle.