The odds are that you've shown your support for a cause with a button on your shirt or backpack at some point in your life. But there's only so much button real estate you can offer, isn't there? That's where BEAM Authentic thinks it can save the day. Its BEAM button pairs to your phone through an app and lets you display virtually any image you want on its circular AMOLED screen, including slideshows and GIFs. You could promote an environmental cause one hour and a dank meme the next.