Japanese retail company MUJI has an innovative way to eliminate odor in your bathroom. It's developed an air freshener toilet paper roll to clear up the smell in the bathroom after someone's done their business.
The roll operates on four AA batteries inserted into the back. Slide the toilet paper on the top, turn on the switch in the back, and the air freshener does its work. It's small, takes up no space and best of all, it's easily concealed.