Doritos Brand Sour Cream & Onion Tortilla Chips. Limited edition! Guaranteed fresh until printed date. Frito Lay. Try the satisfying taste of tangy Salsa Rio. Limited time only! Doritos brand, tortilla chips, Salsa Rio, Frito Lay, flavored tortilla chips. They taste as good as they crunch. www.doritos.com. Guaranteed fresh until printed date or this snack's on us. Questions or comments 1-800-352-4477 weekdays 9:00AM to 4:30PM Central Time. Please provide product name, bag size, date, price and numbers found below price for each package. 2010 Frito-Lay North America, Inc. Visit our website @ fritolay.com.