Teoh Yi Chie at Parka Blogs has a nice rundown of a magnetic, compact watercolor palette from Art Toolkit:
The Folio Palette is a good addition to the lineup of palettes Art Toolkit is already selling. This larger palette allows you to fit more colours in the box. You also get larger mixing areas.
There are a few downsides, but for the most part, this is a terrific option for avid outdoor/urban watercolorists.