Created a wallet for use with TPU filament, like ninjaflex. I personally used Sainsmart flexible filament. I saw the Squeeze wallet on thingiverse but it was way too small so decided to design my own. It easily fits 10 cards and has a small pocket for at least a few bills tri-folded. About the size of a pack of cigarettes. Works pretty well a little big in the pocket.
After using for about a week have decided that the design is too large for everyday use, please look up the new version Squishy Wallet V2.
Printed in the vertical direction