I have an aquaone barracks. Horrible things to clean, need to do water changes almost everyday, and the drippy things jam up and dont drip water out, fish jump out, small stupid ones swim through the hole and either get stuck or disappear into the sump depending on if they are on the top or bottom rack. Plus if the sump isnt topped up on a daily basis the heater will become exposed within 2 days and blow. Haha sorry for the rant about them, they are handy for growing out young fish though if you cover up the hole at the back
I only use them for short term housing to grow up young males. Females can be very nasty to each other. They are naturally solitary fish and some females need to be treated like males (separated from everyone else). I do as Sam suggested and put plastic in between the jars so they cant see each other. In my opinion coke bottles with holes would be the most efficient way of keeping them, I would if i had space.