I have a two setups 10gal tote in side a 17gal tote, one has 3 3" inch net cups could fit 4 but plant would be real close, the other has 3 6" cups and spread out more.
NEVER add water to it in a jar. You will end up with mold. Next time jar them before they are that dry. then open up the jar and let then air out for like 15 minutes a day, till desired dryness. then keep sealed as much as poss.