If you like Quill bobers and can't find them they're easy to make.Get a bag of straws,a hot glue gun and a coil of fine copper wire.
Make eyes with the copper wire leaving "tails"on each end of the loop with a pair of needle nose pliers.Plug one end of the straw shut with hot glue.Put the "tails" from the eye in the other end of the straw and fill the end with hot glue and you have a very sensative (slip style)bober for pennies a piece.
I use half a straw but try different lengths to suit the bait/jig you use.