GT-73 Mr Metal Ball
These are metal balls for stirring, which you put 2-4 in a bottle of Mr. Color or water-based hobby color. By putting the balls in and shaking lightly, you can thoroughly stir even the particles in the bottom corners that were previously difficult to stir.
It is effective for matte, metallic, and pearlescent colors, which tend to accumulate particles. Put an appropriate amount of this product into a bottle of Mr. Color or water-based hobby color, grip the bottle firmly, and shake well to stir.