Space saving fermentation ideas

[Danscraftbeer]

Doesn't make much sense as a forced fermentation test type thing, as the top is completely open and therefore chances of contamination giving you a different result are high...I'm guessing that you've just been lucky so far and not had them get contaminated?

They will turn if you leave them long enough post ferment. But the krausen and the releasing of co2 keeps it pretty good for the ferment time which is pretty short, like 4 to 7 days usually.