NISA PLASTIC CAGES
I won the World Feeder Champs with these in Inniscara, Ireland. They come up off the bottom a lot quicker than wire versions.
If you have a ledge in front of you the feeder needs to come to the top as quickly as possible in order to prevent snagging and possible lost tackle and fish.
I carry them in Mini, Small and Medium sizes in weights from 20g to 44g.