I have used little mint containers before to put watercolors in a small pocket size containers. But the lid was either silver or gold and you couldn't really see the colors you mix. These are Sucret containers that have a white lid with wording on the lids. I bought a little can of glossy white enamel spray paint and sprayed the inside of the lid. Nice and compact lightweight and easily fits in your purse of back pack. You can easily get up to 12 colors in each container.