I've heard some say that you'll have to sit to eat and drink and finish those before you can continue to walk around the park with your mask on. I guess we'll see if they try to take your loophole away.I'm assuming nobody is going to give you a problem for eating. Not that I advocate it. But let's just say I buy a "Mickey Preztel". And take a few bites. Then I decide to walk around the park for the next few hours with my half eaten Mickey Pretzel. Any CM that questioned me would get "Hey, I'm eating a pretzel" - and they would be on their way..
I mention this because - I plan to keep up to rule as much as I can - factoring in 90 degree/100%humidity weather. But if it gets too hot I will pull my mask off. I'm just positing a scenario whereby if somebody wanted to spend $5 on a pretzel, or a beer at EPCOT, even a turkey leg in various parks - there are ways they can get around this rule.