Would you believe how tricky it is to find a little travel palette that snaps closed? I fell in love with some rather expensive brass ones. My next step would have been to order a metal palette and spray-paint it, but I don't have as much luck with ordering things from China, unfortunately.
I may still give that a shot, but as a personal back up, I ran into these little (Handmade Charlotte) watercolour sets on clearance at Michaels for $2. It was a great size, it snapped closed, and it had water wells in the lid. It was similar to what I'm used to with the Cotman set. I took the lid off, gessoed the outside of it, and then used the same blue spray paint that I had for my bicycle (which is still holding up, btw).
My little palette is ready for paints! I'm going to hold off for a little bit because I'm nearly ready to use my gift card and do some self-indulgent art supply shopping. What if I find a perfect palette regardless? The plastic bottom on this one feels really delicate and easily breakable. But sometimes if you can't find the perfect thing, you gotta use what you have and make it yourself!