Well I was recently at our state fair and I noticed that their wire cages all had a little wire "U" that was holding a plastic cup. I thought that they would be awesome to put onto my wire cages for the winter because it would cut my cost down and I would be denting and ruining my nice metal cups that i use the rest of the year. If you have seen these available I would love to know where you saw them. Its just a very simple wire that you push the cup under and it holds a cheap plastic cup in place. Any help is greatly appericated.