It can be a child's toy or a funny prank it is practical and still works if you want to put the cap on a bottle it makes it even better I hope you like this.

Step 1: What You Will Need

A bottle cap, inside if a flash drive, tape, super glue

Step 2:

Take the tape and the drive tape the port end of the flash drive shut so no glue can get in later.

Step 3:

Now put the glue inside the cap and lay the the flash drive with the tape side on the bottom.

Step 4:

That's it now you can walk around pretending you have a bottle cap but its really a flash drive to make it cooler you can put the cap back on the bottle.