A barista should actually know this shit... 

In my bid to never use the Starbucks stupid cup size naming system. I decided to order a 16 fl oz Apple Berry Juice Freeze. It's too warm for my usual 8 or 12 fl oz black coffee.

I needed to show Ms. Barista my cheat sheet because she gave me the "eyebrows-up-hand-hovering-over-cups-waiting-for-me-to-nod" look.

I try my best to be a jerk to idiots but I decided not to blurt out "hey a barista should actually know this shit." because I don't want spit in my overpriced refreshing beverage.