These Oxygen Absorbing Caps absorb the oxygen left in the head space of the bottle. Oxygen absorbing caps are recommended for low gravity beers, beers that will be aged for a year or more, and any beer you wish to protect against oxidation and its staling effects. 120 Count.

California Proposition 65

⚠ Proposition 65 Warning: This product contains chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm.