Last week I go to McDonald's and ask for a large cup of water with my large meal and they say they literally cannot do that. There's no way whatsoever for them to give me a large cup of ice water. I paid for a large meal which includes a large drink, They can fill it with Coca-Cola, Sprite, whatever. But they stated that it is apparently not humanly possible for them to pick up a large cup and fill it with some water.
They also don't like to let you use contactless payments. Some McDonald's have them where they pull out this really long extendable rod with a card reader at the end so you can just tap your card on top of it. Most McDonald's require you to literally give them your card or your entire phone if you are using Google Pay or something like that. Very unsanitary spreads germs and disease easily. Even the ones that have the extension pole, They first expect you to give them your card, and then, if you ask, they will give you the contact list option. That should be the default just to be sanitary. Like WTF
TL;DR: You can't get a meal with a cup of ice water. They will literally not do it for you. They believe customer is never right, and won't lift a finger to help you.