i was searching some websites for tackle and came across a "bottle darter". im always looking for new toys to use so i bought two, one in white and one in black. i have not used them yet since i cant bring myself to leave a lure i know is productive for something i havent even heard of. its about 8" long with a scooped out face like a bottle and a sloped head like a darter. anyone ever use one of these? are they productive?