“Bamboo” test tube with chambers and irrigation

The most popular test tube in the world with built-in chambers and an irrigation system for keeping ants.

The tube is ideal for the early stages of colony development.
The installed chambers allow the queen and workers to choose the most suitable conditions for their offspring [humidity], which is very important in the development of the lonely queen.
The part with sand and a hole thanks to which we can add water is an ideal and trivial solution to keep the humidity in the test tube without fear of water drying out, as is the case in standard test tubes.