A pack of 25 new screw caps, complete with tamper-proof seal, for the Coopers 500ml PET bottles. The caps can be used 3-4 times before they need to be replaced, although the tamper-proof seal will of course only work on the first fitting. When using for the first time, ensure the caps are done up tight enough, to activate the tamper seal. You should hear a "crack" as the tamper ring activates.
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