I drove to the Sonic at Park Lane and Greenville this week because I was craving a Route 44 Diet Vanilla Coke. I love the endless drink combinations at Sonic, and the drive-up menus encourage you to try an add-in. But when I looked at my receipt, I saw that the restaurant had charged me an extra 10 cents for vanilla. So I looked at the menu, and maybe I missed it, but nowhere near the drink selection was any mention of an extra charge for add ins.
Now, I realize that this is a petty complaint (which is why I drove away without saying anything to my carhop), but you have to understand that I'm from Oklahoma, the birthplace of Sonic, and grew up ordering slushes with flavors like Pina Colada and Tiger's Blood before the entire company was streamlined, plus cherry-vanilla-anything-I-wanted — for no extra charge. All I'm saying is don't jack up the drink prices when add-ins are your advertising campaign and, essentially, your trademark — especially if the prices aren't on your menu. (And yes, I'll probably say something the next time I order. I know, I'm cheap.)
By the way, anybody have any favorite Sonic drink combos they want to share? I love vanilla root beer, peach and orange cream slushes (reminiscent of Creamsicles) and chocolate-covered strawberry shakes. That last one's not on the menu, but they'll usually make it for you if you request it.