Lasercut Mini Mint Tin Watercolor Palette
?Make a tiny watercolor palette from a mint tin for on the go sketching!
Watercolors in mint tins were not my idea, though I can't remember where I saw them first! My addition is to lasercut the holes for the paints, because I could never make the holes-poked-in-polymer-clay version look nice.
Some more detailed instructions here: http://www.instructables.com/id/Lasercut-Mini-Mint-Tin-Watercolor-Palette/