Modular Formicarium (Ant Nest)

[Update 2021/01/05] Added connectors for 20 mm test tubes.
[Update 2021/07/05] Added the water seal for the cotton wool compartment.
[Update 2021/01/05] I added opposing connectors and lateral test tube holders. For a better connectio use the opposite connectors.

A Formicarium should not only be ant-fair but also beautiful and expandable. Since I always find external connections unattractive, I have developed a new connection which is on the inside. I am always developing this Formicarium further and I am happy to receive comments and suggestions.

The size is based on photos, so glasses from picture frames are used. For humidification the nests contain a chamber which is filled with humidified cotton wool. The closures are self-closing with spiral springs. Halved ballpoint pen nibs are used for this. For ventilation and humidification, grids are implemented in the walls. All components with grids are designed in grid sizes 0.4 mm and 0.6 mm. All models are optimized for printin