Test Tube Water Feeder for Ants

thingiverse

Test tube holder for 16mm test tubes filled with water. I've been using a similar design for two years as a water supply for an ant colony. Sometimes ants stubbornly walk through the doors filled with water and end up swimming inside the test tube. As they float on the water, you can simply rescue them or use cotton to prevent them from entering. If it doesn't fit your test tube, either resize it or modify the parameters in the provided Fusion360 file.