After making my first duct tape wallet and carrying it around for a day (see below), I learned a few things and decided to make a second attempt at it. Here is the result. It’s much slimmer and sturdier, but I think it’s too tall. I’m still trying to optimize the pockets also. I’ve had several people suggest that I set up shop with the vendors on Telegraph and sell these fine items. If this chemistry thing doesn’t work out, at least I’ll have duct tape wallets to fall back on.