Picking what size oxygen absorber for quart jar storage

If you're trying to figure out what size oxygen absorber for quart jar storage you actually need, you're not alone; it's easily one of the most common questions for anyone getting into home food preservation. There's a lot of conflicting advice out there, but the short answer is that for a standard wide-mouth or regular-mouth quart canning jar, a 300cc oxygen absorber is usually the perfect fit. It's the "sweet spot" that covers almost every type of food you'd want to store long-term. ...

February 22, 2026 · 7 min · Mikel Ahmay