Wallet with pen

I designed wallet with small pen that can be stored inside. You can pull the pen out without opening the wallet, or open wallet without pulling pen out. Easy to print - no supports needed.
Walled stores driving license, ten credit cards and some paper currency.

Wallet - minimal - no pen
Wallet2 - smooth - with pen
Wallet3 - ridged - with pen

Pen uses replaceable Parker style cartridge (check picture, link below).

https://www.amazon.com/Parker-Point-Refills-Medium-3032631/dp/B006J7LEXK/ref=sr_1_17?keywords=parker+pen+cartridge&qid=1552196020&s=gateway&sr=8-17