Sonic already has a pretty extensive lineup, but you'll be surprised to learn how many more drinks, burgers, and sides you can order off of its unofficial menu.

Add Yahoo as a preferred source to see more of our stories on Google. Sonic is testing a whole lot of new items that it hopes will "level up" its drink menu. Still, it thinks the expanded lineup of ...

Sonic is testing a whole lot of new items that it hopes will "level up" its drink menu. That feat won't be an easy one, as the popular drive-thru chain has set quite the standard for itself with ...