I've had a pile of glassine envelopes lying around here for a long time, and as I'm trying to art off my stash, I wanted to do something with them.
The outcome so far are these journals, one with twelve envelopes, the other with eight. The envelopes are just the right size to contain an ATC, with a little space to spare.
I'm going to propose an little swap / round robin to the Alkymia group. I'll place an ATC in each envelope, and each participant can select an ATC to keep and replace it with one for me.