- Steel Wool ‘0000′ superfine (don’t use “SOS” pads)
- Salt (table salt is fine)
- Paper towels
The salt’s acidity activates corrosion of the fine steel wool and the rusting of the steel absorbs oxygen in the container. Just leave a wad of steel wool outside overnight to see this process in fast forward … you don’t even need the salt for that experiment.
Keep all your unused DIY Oxygen Absorbers in air-tight freezer bags until you need them.