If I were to say you can't take something into Disney, you might immediately think I was talking about weapons. And nope, those aren't allowed, but did you know there was a whole other list? Those items aren't listed to inconvenience you, but rather to keep ALL guests safe.
Unfortunately, some guests still take chances on bringing these items into the Parks, and risk getting them confiscated, or being asked to leave.
You can go here, to read the list on Disney's site, but I've got a screenshot of it here for you too.
From Disney's FAQ:
Plan ahead and safe yourself frustration, and time, by checking Disney's list of restricted items before you go!