Metal Material: Made of iron with a secure lid, these tin boxes are effortless to clean and enduring, providing a portable and efficient solution for storing watercolors Secure Fixing: The bottom of each tin box's inner tray is equipped with a magnetic strip, which firmly fixes the inner tray to the shell without shaking Compact and Portable: The mini watercolor tin box is small and lightweight, measuring only 60x48x15mm, making it easy to carry. It's ideal for studio creation, outdoor sketching, or classroom learning 12 Wells Design: Each tin box features 12 internal compartments, each with a capacity of about 1.6ml, sufficient to hold your favorite watercolor pigments. The metal lid doubles as a palette for easy color mixing Multifunctional: These palette boxes are not only suitable for art painting but can also store lipsticks, nail polishes, or other small items