These coins are of my own design and are 3D printed in Glow-in-the-dark Green ABS plastic. Attach a QR sticker to the back and use as a paper wallet, business card, etc. The coins are 36mm diameter.
Pricing:
6 Coins (no QR stickers) sent First Class US Mail for .1 BTC.
or
4 Coin "Wallets" (with QR code sticker/ hidden private key - unfunded) sent First Class mail for .1BTC. I typically fund them with .01 - .05 BTC and give them to friends, leave as tips, etc.
Paper wallets are generated on an offline computer (OSX guest account), using bitaddress.org html. Everything is deleted after they are printed.
Glow-in-the-dark purple also available. More colors on request.