Materials and Tools:

- box
- polymer clay
- rolling pin
- blade
- acrylic paint
- coating

Make the layout of the future mosaic. It is better to make the blank a little less than the expected area so that all pieces could definitely fit. It's easier to work with a square box, but I only had a cookies box.

Mash plastic and form a sausage with a pattern. This time, the strips of different colours are just wrapped around each other. After that the sausage needs to be shrunk to make sections of different diameters. For that, evenly press the sausage with fingers from all sides.

After that, cut the blank into pieces, place them on the base and roll with the rolling pin. Cut the required number of blanks with the blade according to the the layout of the mosaic.

You can make the pattern more varied and use the leftovers of the sausages otherwise, cutting not across but along.

Finish the remaining elements of the mosaic pieces and bake them according to the instructions on the packaging.

Make sure that all elements match each other. If they do not join well, you can cut or grind off the unnecessary parts.

Paint the box any colour and when the paint dries, glue the mosaic using, for example, liquid nails or any reliable glue.

To make the pattern look neater, wipe out the slots, I used coating. It should be applied on the entire surface of the mosaic, and all excess should be removed.

If the slots between the pieces are very small, you can just wipe them with an acrylic paint or just leave them.
If necessary, varnish the box, it's worth doing if you plan to use it extensively.