Clearly you want to make sure your hands aren't dirty when you game. Afterall, dirty fingers can be the difference between that elusive high-score or falling just short, but perhaps more importantly you don't want your controllers dirty. Firebox clearly saw a business opportunity here and crafted some handmade soaps in the shape of classic Nintendo 64 cartridges like Goldeneye 007, Mario Kart 64, and The Legend of Zelda: Ocarina of Time.
We would not use these for washing our hands though, they're far too decorative.