My inlaws are at the world right now. They were at riverside for lunch yesterday and when they went for a refill, it said not allowed. They asked and were told the only way to get refills is with the refillable mug. I hadn't seen this posted but is it only quick service drink stations? It was bad enough they put chips in the stupid cups and only allowed 3 refills. But if true, this is kind of ridiculous.