Review (5/5): Not a bad idea to keep a pack around!
I found these to have more uses than intended. I originally purchased to pass on to those getting used to smells in the medical field - you can't really see them in the nose, and with a mask, they're definitely invisible. I ended up having my mom ask for some when she cleans her cats litter box. They came in handy again when working around a lot of paint fumes (with a mask on, of course). They're a great product to keep around!