Gatorgum

Maker: Pepsi Co. 
Peak Popularity: Late 1990s
Watch a classic commercial here

While all the lames were quenching their thirst with juice boxes and water, you chewed entire slabs of this intense, orange (or lemon-lime) flavored gum. Sold in sporting goods stores, you convinced Mom to buy some so you could conquer the Physical Fitness test. The flavor didn't last, but your Sit-N-Reach record? It will last forever.