Honestly, this product seems designed to make you *more* anxious. The scents and flavors of the refills are horrible—they’re so bad they actually make you feel nauseous. The only decent one is the green one, and even that didn't last four days (and there were three included in the pack). In short, it’s a very expensive product that is difficult to keep in your mouth; the smell and taste are atrocious. I deeply regret having paid $97 for this kit.