A simple tool to create a siphon using two tubes. It uses venturi effect to create a vacuum.
Useful when you want to transfer liquids and you don't want / can't inhale (ex: aquarium water, fuel...). You just need to blow into the tube to start it.
Tube inner diameter: 10mm
Tube outer diameter: 14mm
Watch it in action: https://youtu.be/oI1VGnJdBpU
Be sure to print it watertight!