How about a way to reduce guilt when 3d printing flexible objects – assuming you feel guilt at such times, of course.

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Creamelt is offering a potential route, by making flexible TP (thermoplastic polyurethane) filament out of old ski boots. Described as a sustainable alternative to virgin material, Creamelt TPU-R is 100% made from recycled ski boots. Though flexible, stiff-ish TPU can be used to create objects that are much more robust (now literally as tough as old boots) than those printed with most other easy-to-print filaments.