ANon-refillable bottle caps for vodka is a hybrid tamper-evident snap-on closure impeding refillability. The basicNon-refillable principle utilized is a hydro-seal system (no moving valve or ball inside), which minimizes electrical staticity and alien polymer inclusions in the closure.It is be made upwiththe aluminum shell,transparency dispenser,sealing base,and temper evident cover . when you open it ,the temper strip will turn up and can't recover . We have two size can be choose :30H42,30H60.