This box is similar in shape to ArcBox7 but it includes a top. The top fits securely because it has a groove around it's bottom edge that matchess a ridge on the top of the box.

I printed the top with no supports and the close-up shows what the inside of the top looks like. You might have better results by using supports. My print used a layer height of 0.200 mm for both parts and the top printed in a little over 4 hours, the bottom in a little over 24 hours.