Cold Activated Oxygen Absorbing Bottle Caps
by baggins brew
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These Cold Activated caps are a nifty way to cap your bottles! The caps turn blue when they are cold. The caps start to change to blue at 46.4 degrees and at 41 degrees they are at their maximum blue tonality indication. They also have a oxygen absorbing liner. Enough for a 5 gallon batch using 12 oz bottles. 26 mm.