A treasury box with rolling rings and a keyword that keeps the content (rings, jewellery or something small like that) out of kids hands and makes sure that you can find it. I used in this design keyword "sarppa" as that's the nick name of the person who got this box as a gift. But it's possible to write there what ever you like. There is 6 rings with 16 places each (if you use same size than I did) which means over 15 million combinations. Parts are printed separately. Glued bottom and cap keep rings inside the box.