I first bought one for myself to try and have since purchased one for everyone I know. Reviewers use this when they take their jewelry off at the gym, at the beach, to do dishes, to get their nails done, to play with kids, to do some particularly messy or rough work, or just because their jewelry gets uncomfortable through the day. See how in the picture on the left, there's a little column in the middle of the open box with a hole through it? Once you put your items in the box and top it with the donut-shaped lid, you slide a round metal carabiner through that hole, which prevents the box from opening even a little bit until you take the carabiner off again.
