The orange colored VILSTU potion, which obviates the need for breathing, tastes like peeper and makes the nose tingle. The potion even works to allow one to pass through rooms full of toxic vapors.

A 957 GUE advertizement for this potion:

Amazing Vilstu Potion!

Get by without breathing! Amaze your
friends! Be the first person on the
block to own some!

Order today by dropping this in any
mailbox. Our shipping department will
use the latest in temporal travel
techniques to insure that your potion
arrives the same day you order it!
(Orders received before noon will
arrive the day before you order).