the oral microbiome model system is an anaerobic community; this apparatus allows you to connect a pH probe using the screw side for continuous pH monitoring (we already have a device that does this; but it's suboptimal for other reasons too) plus a second port that will be fitted with a septum to draw gas, draw samples, or add to the medium.
Edit: ah, found this https://github.com/ityonemo/imsocultured/commit/08b57107b757... - "oral microbiome community culturing apparatus" - so the complete apparatus is for culturing whatever bacteria and such you find in your mouth in a mini biome?