Like vip mentioned the water bowl should be enough. I use unprinted paper and i only spray while they're in blue. I guess you could use regular newspaper but im letting you know if it gets wet the ink can stain your tubs not a big deal but im just mentioning it. I'm sure you'll find a place to get unprinted but just to let you know i get mine from a seller on ebay. I get like 500 sheets for around 20-30 bucks. One thing i really like about paper is on feed day when they take the rat i can just move on to the next and not worry about them eating wood chips. Also to people reading i know they can swallow some shavings but i dont like it.