Here’s something I could definitely get behind. South Korean designers Kim Youngsuk & Kim Woosik have created the Color Dial Spray Can that contains four color cartridges (CMYK) in the one can. Two dials (for hue and brightness) help the painter achieve the exact color required. These would be amazing but I’m afraid the technology involved will be way too expensive for something designed to either touch up lawn furniture or do a piece on a wall in an alleyway. Nice design though. These cans would definitely reduce waste and you could get hundreds if not thousands of colors in one can!