Now here’s a challenge…..

[Philip Davies]

What material are they made out of? PET or TPU? Maybe polycarbonate? The boring answer would be try to grind them up for 3D printer filament. A fun answer would be mount them to a central hub and make either a savonius wind turbine or a pelton wheel.

Thanks for your responses. While I have a box of polycarbonate cases, I don’t know about plastics.