Pilfer Proof Caps are used in packaging of liquid material. Made from an alloy of Aluminium, the caps are lacquered on the outside and inside to prevent any spillage. The inside of the caps are also lined with a ring of Polythene for further safeguard against leaks. P.P. Caps are threaded on the inside to ensure a close and safe fit on the bottles and containers they are used with.The caps are tamper proof as unscrewing them leaves a ring on the bottle, preventing reuse.