Sonic is a drive-in Burger joint. I used to be addicted to Sonic ice, but like any "addict," I moved on... to bigger ice! Too bad, because the smaller ice isn't as bad for my teeth. Now I go through several bags of ice from the grocery store every week and I actually choose what fast-food restaurants to go to based on whether or not I like their ice. I like variety...round ice, square ice, hollow ice, shaved ice....
I crave it constantly, and now have a small hole in one of my molars...My teeth ache, but I continue chomping.