If your loved one creates as much gas as the local sewage then this item is a must have for you. Or him. Okay, for both of you. This will be the answer to your prayers. Just tell them to place it outside the door as a warning and you'll be good to go.
Have you ever wanted to tell somebody that they're full of shhhht? What's a better way of doing that than getting them this mug? They will forever be thankful to you and will for sure think of you while drinking from it. And it'll look like they're filling themselves with sht, isn't that the point of it?