The bamboo tube nest is a perfect all-around formicarium for almost all ant species. It can be adjusted to suit every species' nesting needs. This is a high humidity and breathable nest with a water reservoir filled with sand at the back, simply inject water whenever the nest is dry instead of having to switch the entire nest like traditional test tubes.
The three-chamber design allows water to be gradually distributed throughout the nest, with the chamber closest to the water reservoir being the most humid; and oftentimes, where ants like to place their brood. The bamboo tube is also a fantastic founding nest option for newly caught queen ants, as it offers a sense of security for founding colonies due to the chambers have a small entrance where the ants can even close off by themselves when given substrate to suit their needs even better.
The bamboo test tube is perfect for colonies of all sizes, when the first workers arrive, it's super easy to link it up to an outworld using some vinyl tubing, and add more bamboo tubes for expansions when necessary.