Dungeons and Dragons (D&D) dice holder

My son loves D&D. When the case for his dice broke, He asked me to make him a new one. Plastic hinges don't seem to last, so I thought I would design a screw top instead. The container is fairly big and he probably has over 20 dice stored in it. From experience, I know that it might take some experimentation to get the threads to print properly. That's why I've included a part which is just the threaded part of the cup. The lid is the D&D logo and the cup was my attempt at creating a dungeon wall.