Hangable labyrinth puzzle box

Here's a small variation on sneakypoo's labyrinth gift box, that I'm using for a geocache hide container. I added a recessed loop to the lid, allowing a bit of string or wire to be put through it so it can be hung from a tree or whatever.

Yes, I didn't print it in a suitable camouflage color, but the difficulty in this cache will be getting it open after you find it :)

Only the lid STL is uploaded here, use the bottom from sneakypoo's design.

(Edit: 9/5/17: uploaded new STL with a mesh fix)