The 30th anniversary of Post-It notes was celebrated by 3M Sweden this fall with a limited-edition box that touted the brand as the “vintage Twitter.” The retro-style packaging was designed as a reminder that-amidst the worldwide phenomenon of Twitter, where messages are conveyed in 140 characters or less-Post-It notes were the original vehicle for short messages. The promo pack, which included 500 of the sticky notes and a small pencil, was handed out to attendees of Disruptive Code, a tech conference in Stockholm.(Package design: JMW Kommunikation, www.jmw.se)