Ultra thin DIY watercolor Palette from Starbucks

So I really wanted to make a thin portable palette that is not like the Peerless palette though. I wanted a tin. So I was fortunate that Starbucks (Philippines atleast) has this mints tin that is only around 5mm thick and 2.5 x 3.5 inches dimension. I wanted it to fit my leather journal as if there's no palette inside. :) i also used the small cups inside the Pocari Sweat caps. and presto, I now have the ultra thin tin I've been wanting. this doesn't get out of my bag! :)