I know I saw some automatic mineral feeders made of pvc pipe not to long ago, and now I can't seem to find them. I wanted to make some and wanted to check the photo on exactly what to get. Does anyone know what I'm talking about? They were fastend to the wall vertically, filled to the top and capped. the goat eats out of the bottom- like a bird feeder. I thought they were so neat and now I can't find them- search didn't come up with it. Maybe I'm lose'n it.