1 X Beer Bottle Caps - Oxygen Absorbing for Homebrew 144 count Go to amazon.com Related posts Top 10 recommendation brewing supplies bottles for 2022 How to find the best beer bottle caps for 2022? FeatureEasy to UseHelps reduce oxidation and premature stalingPerfect for beers that you plan to age DescriptionThese oxygen caps absorb oxygen in the head space of bottles, which helps reduce oxidation and premature staling.