[With her left arm in a sling, Alice does not look entirely "okay" but she can do nothing about the matter and has to get them both big again. At Elsa's question, she nodded.] The Drink Me is a drink that shrinks you down. It's called that because the only label on it is a tag that says "Drink Me." Don't worry, though, it isn't marked poison so it shan't disagree with you sooner or later.

And the mushrooms could fix it or they could make us smaller. Mr. Caterpillar said one side of the mushroom makes you grow taller and one side makes you grow smaller, but we're already quite small.

Although... that WAS in Wonderland. It may not be the same here. But we've already shrunk and the flowers aren't talking to us to explain.