I've seen short fermenters designed for wine. If you can find a plastic bag with an 02 barrier, you could use a rectangular bin to hold the bag.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk