Are you after the foil heat shrink caps? I buy mine from Brewers Coop in Auckland (NZ).
I believe that the word foil implies metal composition by definition
Ok - there have been quite a few postings since my last visit. I was talking about the foil caps that you use a heat-gun (or hair dryer?) to shrink it. Last time I checked there was nothing plastic about them , let me know if you want me to send you a photo
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