Caring for Ants, Roly Polies, and a Slug?

I have about 5 water bottles filled with dirt, grass, and sticks. I have two ants breeding in one of the bottles. And in another, 2 roly polies, or pillbugs. In another I have a tiny slug about an inch long. The slug and the ants' water bottles are the only ones without a top. Is all this normal, and, how do I feed these guys?