Perhaps that helped inspire the Harvard 3D ... little multi-legged robot that uses vacuum to ambulate across the bench. The paper, however, is behind a paywall. There are really two ideas here.

Interested in experimenting with your own multi-color filament? [Turbo_SunShine] says to just print your own, and experiment away! Now, if you’re thinking that 3D printing some filament sounds ...

Explore the innovative world of multi-metal 3D printing and its industrial applications driven by AMCM and Schaeffler ...