I'm just wondering if there are any products like this out there already... Pasted some information below for reference, but the link has a video.
Are you tired of odors in the bathroom? Sprays just mask the problem. Vent fans aren't very effective and take forever to clear the air. Introducing The Odor Duct (patent pending). This simple but effective solution works with your existing vent fan to remove odors near the source before they mix with the air in the room.
It is inexpensive, easy to install and requires no plumbing or electrical changes. It uses no complex machinery or batteries. All parts are made from plastic and are competely washable.
It can actually save you money because you will run the fan less and will no longer need to buy sprays. It's so effective you may never smell bathroom odors again.
The Odor Duct