This week, visitors to the Democratic National Convention in Charlotte will have the opportunity to snag Off The Cliff campaign buttons. DNC attendees have been grabbing them by the handfuls at msnbc's Experience Lounge.Look familiar? They should — they were designed by some of our loyal viewers: Lance Mar, Marco Rocha and Cody White.Thanks so much for all your submissions. After pouring through hundreds of tweets, Facebook messages and emails, it's very clear we have many artists on hand.In case you missed the Off The Cliff button contest, there's still time. You can create your own convention button on msnbc’s Facebook page. We'll display it online and on-site at the DNC in Charlotte.