The shapes created by infill patterns are incredible.
I particularly like honeycomb. It looks so futuristic and high-tech. And really shows off 3D printing technology.
Print Instructions:
set top and bottom layers to 0
select honeycomb infill (not honeycomb 3D)
2 or 3 perimeters. More perimeters the more stiff it gets
PLA or PETG. PLA is more likely to snap from max bending
Credits:
samlovecroc