A simple dice tower in the shape of the Tardis. (yes, it is bigger on the inside but it requires a special type of 3D-printer that only dr Who can provide you with - if you want one, make a crack in a wall and have another dimension leak through it).
it's made in 3 parts where the top one also is the lid. The lid has a 5mm whole in the center in case you'd want to put a light into it (see picture).
I used a small led from an old Christmas Tree light thing and a clock battery, added a simple switch and glued it all into the inside of the lid (there is plenty of space for it)