Note: Uploaded new stl and 3mf that make mobilizing the hinge much easier.

Recycling AeroPress filter paper is probably not worth the effort. I just looked at eBay and see I can get 700 discs for $18 (with free shipping!). That works out to about 2.5 cents per cup. But that didn't stop me from designing this "print-in-place" hinged filter washer. I was amazed to see this thing worked perfectly right off the print bed. As with all print-in-place designs, be gentle as you mobilize the joint. Tolerances are quite close and if you're too aggressive, it's likely to break. Otherwise, this looks like a quick and easy way to rinse out your coffee fouled filters and put them in the drying rack: https://www.thingiverse.com/thing:6080973