7-Eleven to Sell Blood-Alcohol Test Strips

Customers soon will be able to pick up a sobriety test with their Slurpee. Convenience store chain 7-Eleven will be the first national retailer to sell the Guardian Angel Personal Alcohol Test at participating stores.

Customers can determine their blood-alcohol level by placing a test strip on their tongues for five seconds after not eating, drinking or smoking for 10 minutes. The strip will indicate blood-alcohol content by changing colors. The portable test strips come in a package the size of a credit card.

The test, made by closely held San Francisco company Guardian Angel Holdings Inc., has a suggested retail price of $1.39, Guardian Angel said in a statement.

Shares of Dallas-based 7-Eleven rose 25 cents to close at $10.15 on the New York Stock Exchange. They have fallen 53% in the last year.