So you partake in one drink during a visit to a bar or a social gathering. Each packet is about the size of a credit card and contains two testing strips.
Users insert a strip into their mouth for five seconds.
Results are color-coded, with darker results indicating higher BAC levels. More than 1 million people are also injured each year in alcohol-related crashes, an average of one person every 30 seconds. In certain cases, some social drinkers mistakenly think they're OK to drive when they're actually impaired. Each Guardian Angel packet costs 99 cents. It's sold in Sparks by The Plaza C Store on North Rock Blvd.