"It's called bilerat stew, Zayne—it's one of the few staples we've got plenty of. Smells awful, but the thermochurns keep it good for months."
Ko Sornell to Zayne Carrick[src]

A thermochurn was a utensil used by Mandalorian Neo-Crusaders at war for keeping food good for months.

Ko Sornell used one to keep bilerat stew warm for her family during the Mandalorian Wars.