Just purchased a bunch of rats

I made a rat rack but have not gotten to the auto. watering system yet. Where can i get cheap, but decent water bottles for the rats? Any online places? Or does Walmart sell them? Let me know. Thnx guyz.

not sure of a place online to get water bottles but walmart has pretty nice ones for about 3 bucks the one by me has 8, 16 and 32 oz. ones that are all nice grade of plastic

Alright just wanted to check before i drove all the way to Walmart. Had to drive 4 hours in total to get these rats today. Thanks a lot.