Cold Activated Bottle Caps

Item Number: 24-4259a

Sale price$5.49


120 per Pack

120 Cold Activated Bottle Caps with Oxygen Barrier

You've seen thermochromatic cans and labels on commercial beers for a while.
Now homebrewers can top their brews with a cap that will turn blue when the beer is cold enough
to drink. Seriously, how cool is that??

These will fit standard crown cap beer bottles. These will not work with twist off bottles or Belgian style beer bottles. Each package contains 120 bottle caps.

  • 5 gallons in 22 oz bottles uses 29 bottle caps
  • 5 gallons of beer in 12 oz bottles uses 53 bottle caps
Looking for something a little different? Shop our complete collection of beer bottle caps.

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Customer Reviews

Based on 5 reviews
Bruce Yoshioka
Nice caps!

These are some pretty nice "novelty" caps. Seems kind of fun to have color changing caps. I'd buy again...actually, I think I did and they should be arriving soon.

Jim Morrissey
Bottle Caps

Pretty cool. Worth the buy!

Fun and functional

I bought these on sale just to try them out and they work! These are fun for get togethers and novelty. I probably wonít use these on every bottling but might mix them in for 6 packs to friends and family.

Tony Bowker

I came to your site to buy caps, and a capper. I was amazed at all the items you carry. I had to try the Cold Activated Bottle Caps. At this time, I can say that they were easily applied with the Red Rocket Bottle Capper, and they all seem to have sealed properly. I'm still waiting on my brew to finish brewing so I've not yet refrigerated any to see the caps change color, but waiting patiently. Great product, highly recommend.

Changes pretty quick

Caps do as they say - color change to a dark blue when they are cold. Changes pretty quick back and forth too. I give it four stars though because they rust really really easily. The inside and outside tops are okay so the beer should be fine, but it's not pretty to see rust on the edges of the beer cap.

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