I am new to brewing and I wanted to find a way to keep my fermenting brew cool. I experimented by taking a cardboard box measuring 32"H X 21.5"D X 16.5"W, went to Menards and boutght 1.5" foam housing insulation, cut the foam insulation to fit the dimensions inside the box. I cut away on side...
I decided to try the O2 absorbing caps. I assumed that I would boil them prior to bottling just as I do with regular bottle caps. However, as I was browsing through "Homebrewing for Dummies", by Marty Nachel, he mentioned that your not supposed to boil these caps. Are these caps...