"Every Fart By Mail comes hermetically sealed in a very glamorous crystal clear polyethylene envelope."
"Dr. Stink writes a message to your friend explaining what they are holding. After all, when was the last time they received a fart in the mail?"
Or, you can order a stealth fart free of all warnings and messages to catch your victims unawares.
Check out their first commercial:
(H/T Laughing Squid)