Because of their small size, my handmade palettes have a tendency to move around when you mix on them, so what I do is attach magnets on the side so they stick and stay put beside the tin. You can stick these magnets to the plastic palettes with good old Mighty Bond. You can go to 0:11 on this video to see what I mean.
Adding the magnets will affect how the palettes fit back in the tin, so you might want to measure before sticking on all sides. I’ve measured those palettes vs. the tins right to the last millimeter so even a thin magnet might affect the fit. I’m always looking to improve my products, so if you have any feedback about them, please do let me know 🙂