Just the thing for a fake gift on April Fool's Day:
Here is the item you have been looking for, just like Flatulence Medicine!
The Flatulence Deodorizer - Reusable is an activated charcoal cloth pad that is worn taped inside the underwear next to the buttocks. The wearer is virtually unaware of its presence because it thin and comfortable, and you insert it inside the undergarment or panties.
The activated carbon cloth pad is washable and reusable.
You can get several weeks use out of a single pad, depending on usage.
Also check out their other items, such as the chair pad if you like to fart in your office!