Sunni Smile
Wikisimpsons - The Simpsons Wiki
Sunni Smile is a toothache cream, presumably manufactured and sold in Persia.
History
While the Simpsons wandered through a run down Springfield Mall they came across a collection of candle kiosks and Persian CD stores, in what used to be a JCPenney's. The owner of one of the CD stores attempted to sell the Simpsons the latest CD by Nabil, a Persian musician. Homer was reluctant at first, but ultimatly agreed when the man offered to throw in some Sunni Smile toothache cream for free.
The cream comes in a dull, yellow and white colored tube, which has the logo on it. Beside the logo is a smiling Persian man.