Nope, as many refills as you want to pay for. And yes, the popcorn carts are in the parks. Kind of hard to find sometimes, but they are scattered around.
awesome tip!!! thanks. I have been multiple times to Disney and dont know how I have missed this. My kids are crazy popcorn fans… And no day limit as far as how many days you can bring it back into the park?
No day limit. And it works in any park. We bought our bucket in Epcot but refilled it everywhere DH was willing to carry it, LOL! It did fit in a backpack though, so it wasn’t too bad.