Small Sci-Fi Algae Vats Stand

A vaguely sci-fi looking stand for 25 ml 30 x 60 mm flasks (example).
It's supposed to resemble research vats.

These glass containers are often dimensionally inconsistent.
Added ribs should help with minor deviations, but I can't guarantee a tight fit.

Great for growing tiny marimo moss balls.

Credits

• Marimo photo by @Ragnar Sigurdsson