I created a deck holder that can expand a bit according to more expansions you add. Should fit a lot of playing cards or otherwise scale to your liking!   :)

Right now it has a Muchkin ardgame detail for the top. I might add different toppings in the future. This particular top was inlayed with yellow resin to create the colourful contrast.

In the bottom, there is space for elastic bands to keep the to and the bottom together. Pause the bottom part at 3mm to insert two round rubber/silicone bands and continue printing to enclose them. I used 70mm diameter silicone bands to have a good result for my deck.