I have a bunch of sheets, same stuff but I got them from a conservancy. I've always wondered what the heck I'd ever use them for, and my travel humis are a great idea.
I never worked them into anything because the actual amount of beads/exposure/mrh value in the sheets is really pitiful compared to even just a tiny little bead sachet.
In a cigar caddy that's really well sealed, I could hide the beads behind the foam. I could charge the sheets up by throwing the open caddy's in my winador.
Now, if I can only find the big envelope of sheets.