I was excited to learn that if you have a metal door on your medicine cabinet, you can buy little magnetic baskets for holding cotton swabs or other toiletries. The basket attaches to the door, thus saving space in the cabinet and allowing for easy access to the cotton swabs.
I was less excited to learn these baskets cost $15.
So I decided to make my own using a spice tin. I cleaned out the tin, filled it with Q-tips, and attached it to the door with two magnets, like so: