... of course if your date thinks paying more money for popcorn is impressive you're still outta luck.
Medium Bags Of Popcorn Often Hold More Than Large Tubs
If you buy the large tub of popcorn at the movie theater for the free refills, go for it, tubby. But if you're buying it because you just want the biggest size available, UC Irvine professor and author Richard McKenzie says to watch out if the medium is a bag while the large is a tub:
If you're [at a movie theater concession stand] which gives you a choice between buying a medium bag of popcorn and a large tub of popcorn, there's a greater-than-50% chance that the medium bag will actually contain more popcorn than the large tub.
~ from The Consumerist