Starbucks Sizing

I’d really like to know why they don’t just have small, medium, large, extra large. That would make everyone’s life much easier. I personally don’t go to Starbucks because I hate all things coffee with a passion and am unwilling to pay their prices for anything else. But I still get amusement from hearing people talk about their Starbucks experience. But if I could get a 64oz hot chocolate for two to three bucks I'd be there every day.