Test tube coupler
This robust connector you can use to connect the ant colony test tube seamlessly with your flexible hose to an arena or your ant farm. The coupler is suitable for almost all test tubes.
All ant species pass through the hole of the coupler. If you have some trouble to fix the flexible hose in to the coupler, than hold the flexible hose for a short period of time in hot water. The tube will then be more flexible and is easy to insert in the coupling piece.