Once upon a time (i.e., up until August 2010), people who bought Business Select tickets on Southwest Airlines flights were treated to free drink coupons that didn’t have an expiration date and could be used at a later date if the passenger didn’t feel like tippling on the day of the initial flight. But now that these coupons are only good for the date of issue, one Southwest traveler with a stockpile of now-useless paper is suing the carrier. [More]