If you drink, you can always be safer by using a breathalyzer. If you don't drink, you may know someone close to you that does. Without a breathalyzer, you can't be very sure about how drinking alcohol relates to your specific Blood Alcohol Concentration (BAC). There are generic weight charts available, but they are only vague approximations and do not account for the differences in body chemistry from person to person. Only with a breathalyzer can you know for certain. Even if you don't drink yourself, you may have a parent, a child, a friend or a close peer who does. Maybe you are hosting a party where alcohol will be served. Whatever the case, don't let your loved ones fall victim to the heavy fines, criminal records and even possible loss of life in the face of alcohol-related tragedies.