Zoltan Szabo has incorporated the most important things about palettes into one palette. It should have both big and small wells for mixing color and using larger brushes. It should be sized to fit into a backpack or folio.  

Application : The wells have a sloping configuration and a deeper "pool" to keep paint from evaporating. It should have no sharp edges to shave your brushes, and it should be easy to use with a palette knife. Its secure lid protects paint and makes traveling easy. Description : Measuring a compact 12 1/2" x 8 3/4" x 3/4", this palette is ideal for use in the field or in the studio.