You can always buy a professional paint palette if that fits your needs, but really anything can be used to hold your paint.
I actually used paper plates and Dixie cups when I was first starting out!
However, you may want to get multiple palettes to have at your next rock painting party.
This way everybody has one tray to themselves and messes are better contained.
Palettes are great for keeping both your colors separate and for mixing paints together. Washing and reusing them is a breeze as well.
Here are a range of basic to high end paint palettes to choose from depending on your project needs!
Check them out below.