I saw a 'flood' once at the shop where I buy feed and feeders - it was a sad scene. I won't be going to a watering system unless I have a LOT of rats. I am using 32 oz water bottles from petco - they're 8 bucks a pop but if one leaks or whatever I won't drown or torture any animals. I have to refill them every 3 days or so, but it takes me less than 5 minutes to do so.