Guinness QR Cup Reveals Scannable Code When FullGuinness QR Cup Reveals Scannable Code When Full Another reason to choose the black stuff QR codes have been exhibiting an uncharacteristic characteristic lately—they've been not sucking as much. We had the Korean retailer's 3-D sunlight-activated QR code, which was scannable only at lunch, when the shadows lined up. Now, we have this Guinness QR code on a beer glass, dreamed up by BBDO New York.
