I think I've been the victim of a practical joke.
A friend of mine shops at costco a lot and he said to get their big bag of rice -- it's pretty cheap, really good, and I do sorta feel good about getting the larger size and cutting down on the amount of packaging places use.
So I got one, and my brain didn't kick in until I got home:
WTF am I gonna do with 50lbs of rice? Besides catch a shark and make sushi the size of a buick? How on Earth am I going to keep it fresh?