About this 3D model
I liked the idea of coin holder made by shack90: http://www.thingiverse.com/thing:9116 However I needed it for polish coins (PLN), so I designed it by myself: pln_coin_holder - 1gr,2gr,5gr,10gr pln_coin_holder_big - 20gr,50gr,1zÅ,2zÅ,5zÅ