Take a pen and ruler and draw similar sized and angled line on every 4 corners (The line should be long as high you want your box to be).
Cut according to the lines.
Cut all 4 corners.
Band up the 4 sides
Then And then glue the corners. You can learn how to make a box also from the link
Use the similar technique to make the lid. Just leave one side open and a bit longer.
Take a piece of sponge according to the size of your box. Draw lines for the rows of your rings.
Cut according to the lines. But don't go all the way in the sponge just halfway. Then glue the sponge in the box