The same stuff that's in stink bombs (ammonium sulfide) only packaged in a small bottle. A few drops causes a horrible smell.

Stink Perfume is exactly the same stuff that is in stink bombs. Packaging is the only difference. Stink perfume comes in a small bottle with a cap while the stink bombs come in sealed ampules. One popular way to use stink perfume is to get a small, wide-mouthed jar with a lid and put a cotton ball inside. Pour some stink perfume on the cotton ball and close the lid of the jar. To create a stink bomb effect open the jar and wave it around. Or just sprinkle a few drops of the stuff in a strategic location such as the air intake of a ventilation system. For tips on using practical joke products, subscribe to The Practical Joker Weekly Newsletter on the home page. It's free.