Modeled after Edgardo Doberstein's "SIPHON HOSE PUMP" https://www.thingiverse.com/thing:3435422 and other similar Shake/Jiggle Siphons, I created this customizable one in OpenSCAD. The default geometry in the STL file has an 8mm OD barb which is good for a 1/4" ID (~7mm) nylon tubing, and expects a ~16mm marble, but my OpenSCAD file is included for you to customize.

To assemble, insert a marble then screw the top on (I was thinking of having you add the marble while printing but then opted for the screw-on top instead :-). Add tubing to the barb. No screw is required to hold the marble in place.

To operate, shake the end up and down while keeping it submerged in fluid. (NOTE if you stop shaking, the fluid will leak back down around the marble since the marble doesn't make a water-tight seal. The goal is to get enough fluid in the tube that the rest will siphon out by itself using gravity, if the other end is lower that is :-)

Please add a note or post a make if you find a different geometry works better.

(Sorry, the marble is not included, but maybe I'll design a spring-loaded valve later that doesn't need one)