When we mix a Color Bomb with a Coconut Wheel, we will receive "Striped Candy" in that whole row/column on the Board. This comes in very handy with clearing the blockers like Chocolates, etc., in the "Ingredient Dropping" levels
I know my explanation was not clear. I will try to post a screenshot / picture soon
I also vote for the color bomb because it is so versatile, especially when combined with another cb or a wrap (cb stripe combo is pretty good too). The UFO is excellent but hard to get and of course the party popper booster is awesome but very rare.