Already done :-)
https://www.thingiverse.com/thing:2386628

Currently printing the cable snake out of black flexismart. It's basically rubber tpu.
When printing with super flexible rubber filaments up your extrusion rate to around 120-130 % and print real slow 10-15mm/s
One of the features of flexismart is that it sticks to printbite like a limpet on steroids. So I can run the first layer at 100% speed and not need the nozzle that close to the printbed - and also don't need to heat the printbed.
That pretty much goes for all tpus.
bendycableholder.jpg


Only just fits on the printbed, if the bit that bolts to the strut wasn't angled to keep it away from the hotbed, I'd have to do it on the klic-n-print.
flexismart is the cheapest rubber filament by quite a long way. Thats aid it's also the least stretchy and the weakest. It's probably the closest to tire rubber in surface feel, stiffer than ninjaflex and filaflex.

Useful for all sorts of things :-)
Don't think it's available in the us yet. But polyflex is cheaper over there, so it evens out.