Got something to hide? Do ya? (;
Try a hollow book stash box!
And then… put a “tamper evident” lock on your stash box! That’s what I did recently with this large Star Wars book. I hollowed it out by hand, detailed and glued the inside and added rings to attach a small combination lock. It may not be super strongly secure but if somebody tried to open it it wouldn’t be as easy as flipping it right open. This particular hollow book was a birthday gift and the gift-giver with the idea just wanted the gift recipient to have an extra road block in between them and the other gifts that were to be gifted inside!