I total forgot about a pile of old pvc water pipes we had till i started cleaning the barn a few days ago. We have just tons of the water cups *photo* that screw into round pvc pipe. Also have metal water nipples that are in a square pipe. Does anyone have any links or suggestions on what we could do with them. Ive seen stuff for the water nipples but never for the water cups. It would be nice to actually use them for something than just having them sit in a pile waiting to be thrown away.