Has anyone use the tips that go on the bottom of pop bottles and then attach to the sides of a run? I was thinking about getting a few of them since I will be out of town for a few days this summer and not sure if I can find a reliable person to come up to my house to check on them. They most likely won't be laying yet so I'm not worried about egg collection and the feeder will hold enough for 3.5 days. I'm just worried about water. I was thinking of getting 6 of them for my four hens.