Wanted to make a Harry Potter themed box for a valentines gift.
The base is solid with the deathly hollows indentation, but the walls of the pyramid are hollow through.
20% infill made it about 1lb of weight fully assembled considering i used metal nails as the hinge rod.
Solidworks parts available if you want to modify, as the parts are pretty thick in real life. I didnt like the quality of the print from my printer, so i covered the parts in a black vinyl and it turned out great.