The closures are snapped over the bottle neck, which incorporates lugs and snap bands to prevent the closure from being rotated and levered off. When the bottle is in the upturned position the valve closes against the pourer, but when upright the valve/s in the closure slow down the refill rate by closing against the washer.
Configurations include single or multiple valve variants, with or without break-off tamper indication and special resins for the pourer and skirt for improved fit to the bottle. A double valve can be incorporated into aluminium shells for added protection.
The closures come in a range of sizes and can be decorated in printed colours and foil blocking.
