You Leave It, You Lose It
When it comes to any fast food (drinks included) if you leave it out of your sight, it should be fair game. You shouldn’t even need to write this long note detailing why you took a drink out of it.
When you get McDonald’s and you’re around people who don’t have McDonald’s you must know that you’re going to be in danger of getting robbed. You wouldn’t leave your newborn baby alone on the street, so why leave your fast food? It’s simple math.