Memorabile box

I swam competitively for nine years, so diving is a big hobby for me. In 2017, my family and I were on vacation in Egypt. One afternoon, while we were diving, I made my first dive of ten meters without diving equipment. From this dive, I took a shell to the surface, as proof of the dive to the very bottom. Not long ago I discovered that my father kept it as a souvenir. He kept it in a drawer in his desk. So I decided to create a box that would remind the ten meters and be a nice artifact to exposure off the table.