Ever wondered how a pythagorean cup works? Print yourself this 2(and a half)D version of a pythagorean cup siphon. You will also need two 100mmx85mm pieces of acrylic glass. Use glue suitable for gluing your filament material and acrylic glass, to make the siphon watertight. I printed mine in Polymaker PolyLite PLA on an Ender 3 V2.