I have noticed that after I open many of my beers, my caps still look perfectly intact. I.e not fractures stresses and are relatively clean still.

It seems like such a waist to just chuck it. Does anyone out there re-use theirs, and or what would be a good reason not to re-use caps?

I know the are cheap. But is that really the only reason to use new ones?

  • Talking about twist caps, right? – Philippe Oct 1 at 13:30
  • Perhaps I should have mentioned that. No. Popcaps. – 765tgs Oct 1 at 13:37

I never considered reusing caps, in my opinion, they probably have suffered some sort of flaw in their ability to reseal a bottle and be able to retain pressure. If you want to try a few caps after an inspection have at it. Be sure to sanitize well before their use. Considering their low cost it may not be worth the risk of losing a bottle of beer.

  • I suppose the Risk vs return angle makes sense. You risk an entire bottle vs the cost of a cap. – 765tgs Sep 30 at 13:17

The shape of an unused crown cap is such that if you crimp it over the bottle top, it seals it nicely. A crown cap that has been pried off of a bottle is bent and might not seal entirely when reused.

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