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How to add absorbent material to your undies and never buy maxi pads again, or toss them in landfills for that matter. This took me all of about 5 minutes. I like these a bit better than cloth pads b/c they are thinner, don't shift around, and are more comfy to bike with. But others have posted neat patterns for cloth pads, so look them up too!
Step 1Materials
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I use packs of cheap undies and kitchen towels from Trader Joe's. The towels are made of the same material as camp towels, I think, so they are soft, washable, and absorbant. You can use terrycloth, flannel, old socks, whatever you want, but i happen to like this combo. I use single ply in combination with a Moon Cup, but ymmv, so double or triple up if that's your steez. Of course, toss the whole shebang in the wash before you start to get out any sizing and/or cooties.
I think that's another source of ... *ahem* gas, just waiting to be tapped.
ARTI Biogas Plant: A compact digester for producing biogas from food waste
<3 appropriate technology<3