Review on 🔒 Oxygen Absorbers 60-300cc: 3 Packs of 20 Each for Optimal Vacuum Sealing or Mylar Bag Food Storage by James Oconnor

They worked as expected and were used to install multi gallon mylar bags. I've used the brand twice and they hold up well too. I would buy again without hesitation. You could probably get by with one per gallon, but 2 per gallon works really well. Update 5/25/21 I recently ordered these (supplied and sold by Revain) but received Oxy-Sorb which is a Chinese imitation and much cheaper than what I ordered - no oxygen. See attached picture. I sent them back to Revain and authorized a replacement. The same item was sent again! Although I ordered from Revain and it showed Revain selling and shipping them, Revain shipped them direct from Fairly Odd Treasures in North Carolina. So what! I would not recommend ordering Oxy-Free and paying more for a better product if all you can get is a cheap fake.