I was ordering vitamins and supplements from Amazon and was just "that much" under the total amount required for free shipping . . . . so I bought this small black bag. Holds an amazing amount of sketching tools, easy to access, and even a regular-size sketchbook will fit in the main pocket.
I tried painting the "black" using lunar blue but even after spritzing the pan a few minutes before using, the color would not pick up or mix easily. It's been in the full-size plastic pan for several years (over half gone now) --- maybe it's too old? It's a PrimaTek paint from Daniel Smith.