Jar Jar Binks Mega Mouth Candy.
It was an Episode I: The Phantom Menace tie-in from back in the day.
It was a very detailed Jar Jar Binks head, with his TONGUE thrusting out at you, and you sucked on that candy goodness.
It's all here in this Topless Robot article.
Now if you'll excuse me, I gotta go throw up. Lots.