YUM F2 was independently tested by Mississippi State University to be 30 percent more effective than the leading attractant. It's an all-natural, super- charged attractant. YUM F2 is available in big 8-ounce spray bottle that applies the attractant to the lure, not your hands or boat. The spray bottle features an ergonomic design and a soft trigger. Anglers can't buy a more effective attractant -- it was proven in a clinical, scientific test by independent researchers! Plus, it's all natural and won't harm the environment.