Why does Oscar Isaac drink so much milk in Frankenstein? We asked Guillermo del Toro’s collaborators

Having a character chug a pint of whole milk is an easy visual shortcut to establishing that they’re evil, or at least a little off. We’ve seen it in countless movies, ranging from A Clockwork Orange to Inglourious Basterds. Javier Bardem’s methodical serial killer Anton Chigurh drinks milk in No Country for Old Men, as does Allison Williams in Get Out, in a scene shortly after Jordan Peele reveals her evil plan. And in The Last Jedi, Luke Skywalker gulping down green milk is a clear sign that something has gone horribly wrong.