Hmm, that's odd. When I was in the US, fast food restaurants tended to have much larger cup sizes - with hard plastic rather than a paper cup in the large size

Hmm, that's odd. When I was in the US, fast food restaurants tended to have much larger cup sizes - with hard plastic rather than a paper cup in the large size, presumably for stability (like [1]). In that comparison image, the small would be an Australian medium, the medium a Large and a US large size only available at cinemas who have enormous cups. [1] http://i.imgur.com/g8qLjAQ.jpg http://i.imgur.com/g8qLjAQ.jpg