If you have a steel framed medicine cabinet the MagnaPod plastic storage containers magnetically attach to the inside of the door. For wood or plastic medicine cabinets a thin steel sheet can be purchased to adhere to the interior cabinet door. One of my favorite solutions is the toothbrush holder. I currently have my toothbrush on top of the sink near the toilet. However, I have heard too many studies about the germs that enter the surrounding area when the toilet is flushed. Also, it is polite to have personal items, such as a toothbrush, tucked away when entertaining guests.
To view more MagnaPod storage products, check out the MagnaPod website.