Do you need a small place to stash things at home or in your car? Wish sells a full range of hidden compartments. These can be used to hide a little cash for an emergency or other small items.
Some of these are batteries, like the fake C battery shown here. There are also a lot of fake lighters and even some fake outlets that allow you to stash something in a wall.
Make sure you check the descriptions so you get what you are looking for, as some of these may not be exactly like the picture that you see.