The rules for buying/transporting bottled (sealed) alcohol in the parks are kind of strange, too.
I purchased a bottle of wine in the France pavillion. The wouldn't let us ship it back to our WL room for whatever reason, so we carried it out the International Gateway on our way to Fantasmic. When we tried to enter HS, they confiscated it and held it at security (even though it was boxed up in a Disney shopping bag and I had the receipt). Kind of embarrassing, and it took awhile to claim it from the booth at park closing. They told me to bring it back to my room next time. Um... next time I just won't buy the wine.
I get it... it's a glass bottle filled with alcohol... but it was just fine in Epcot. Obviously, it would not have been "okay" to open it in either park.