I am so sorry, I inadvertently drank some of your leftover iced coffee several times this morning! It’s difficult to tell since we both have ones in the fridge, but I think you’ll be able to identify yours when you get home by how much is in each one (yours will have less in it by that point).
Again, I am so sorry for what has kept happening. If there was a better way to identify them, I’d love to know, but there’s definitely not, so no use trying. Anyway, on the upside, you’ll have a delicious leftover beverage to enjoy when you get home! I’m not completely sure how much, and the whipped cream will likely have evaporated into nothingness due to the chemical reaction of being in the refrigerator.