You'll get 18 colors (including two white).
Promising review: "Colors are vibrant and opaque, while still drying matte. They're easily workable and the inclusion of two white pans is a huge plus for me, as it's always the color that goes first! The palette itself is durable and well-made, snapping tightly into place when you're ready to store your paints. At first I was concerned about the colors drying, but frankly there's so much paint that I don't see that happening anytime soon as long as I continue to spritz them with water and stir them a bit occasionally. My favorite aspect of this palette is the amount of paint in each cup, I often find myself being afraid to waste paint with my more expensive tube gouache, but that's not an issue at all with this palette. Overall, this is an amazing palette for people who are learning gouache, and experienced artists alike. It gives you a genuine gouache experience, and lends itself to lots of experimentation without fear of wasting expensive paint." —analee
Get it from Amazon for $17.99+ (available in four colors, with and without paint brushes).