Act Fluoride rinse isn't being deceptive. Fluoride in toothpaste or rinse attains maximum benefit when used several times daily with these low doses. Each time, the enamel remineralization process is aided by exposure to that type of fluoride. Our frequent, daily habits of snacking, drinking acidic drinks (sports drinks, flavored waters, energy drinks, carbonated beverages, etc.), and eating normal meals produce acids that linger in our mouth and are capable of beginning tooth decay. Some people are excellent 3X a day brushers and flossers using a fluoride toothpaste, but have signs of acidic breakdown. They may benefit from an additional rinse(s) of fluoride. Some people can't remember to rinse more than once daily. Some people take medications that greatly reduce their salivary flow (sometimes unnoticed) causing constant acidity of the mouth. Both Act fluoride strengths offer direct benefits, but deciding which strength to use and frequency should be asked of your dental professional. Often, our office recommends using a rinse twice daily. I think buying either container is a good buy. (If I remember correctly, I think fluoride containers must meet federal size guidelines for safety so an accidental ingestion by a very young child wouldn't result in injury. So, perhaps the larger container cannot have the higher concentration of fluoide.)