Bag of Safe Place

The Bag of Safe Place is a bag of holding that is, indeed, a safe place to put your valuables. Unfortunately, the items are SO safe that they cannot be retrieved easily. Sometimes retrieval is impossible. Each time a player opens the bag to retrieve an item stashed there, they roll 1d20. On a 20, the successfully find the item they are looking for. On a 1, the bag appears empty. On any other numbers, they find something they weren't looking for, as determined by the DM. The other items can be things the player put in the bag, or random things they don't remember having. Other than this, the bag acts as any other bag of holding in terms of safety for living things and acting as an extra-dimensional space. In theory, a living being could be placed in the bag, retrieval and escape attempted, and the experience recorded, but the chances of suffocation are high.