The CSL Hooker Pop Ups are actually hybrid boilies in a pellet shape. They contain large amounts of Corn Steep Liquid, feed stimulating soluble attractants and betaine. They are made of half boilie mix and half of the ingredients used to make CSL pellets. The wide range of flavourings makes them an effective bait in any situation during any period. It is best to use CSL pellets and/or Betaine Attract Pellets for the ground bait together with the CSL Hooker Pop Ups. Each box contains a 25 ml bottle of feed stimulating liquid as well as the Hooker Pop Ups of the same flavour. It is advisable to soak the hook baits in the attractant liquid for 24 to 48 hours before the fishing session to give them an edge.