Back in the late 1970s and early 1980s, My grandfather carried a small flexible plastic pouch in his pocket to hold his change to keep it from rattling around. I was experimenting with TPU the other day (and still not good at using it) when I printed a wallet to see what you could do with it. The Wallet printed, well, ok. It showed me what can be done with flexible filament. So I did a search for a coin pouch like this and found nothing like I remembered. Off to Designspark to make one. I sat on the PC for 30 or so minutes and designed one and put minimal support on it. I ran it through my trusty old Anet A8 and it printed, not well, but it was successful. The problem with it was that it wobbled more and more as the layers went up and the quality got worse and worse.. Next morning I hopped back on the PC in Designspark and added supports. This printed MUCH better, but still has issues. I am a function over form printer and I have a tendency to print FAST and DIRTY with .3 layers. I did slow it down to 35mm per second to accommodate TPU printing but it is far from perfect. This is on my skill as a TPU printer, not the model. If you have a well tuned printer set up for printing TPU it should work out great for you, especially if you slow it down and set the layers to .15 or lower. Enjoy!