I printed this ring in TPU and PLA on A1 without AMS
The outer TPU part of the ring makes it more resistant to damage if it accidentally hits a hard surface such as asphalt or concrete, while also increasing safety and making the ring easier to catch. The inner PLA part adds structural integrity and an additional color, so the ring still looks cool even when printed in black TPU.
The bottom of the TPU ring was printed on top of a PLA support (TPU doesn’t stick well to PLA), and then a PLA insert was printed to interlock with the TPU ring.
11 manual filament changes using this method of multi-filament printing on A1 without AMS.