Chastity device reviews discussion

I have a query for the specialists here: what is the least noticeable ball-trapped contraption to wear with jeans? For me, security isn’t the top priority; I just need it so you can’t easily put it back in once removed. The CB-3000 suits me fine and creates only a minor bump (particularly when seated), but perhaps another device of similar design works even better here (one of those metal ones?). Could someone give some advice?