You might be upset if you've been investing in oil lately, with its price sliding following OPEC's decision not to cut production. But fear not! Just take a look in your fridge — there's probably stuff in there that was a better investment than a gallon of crude oil.
West Texas Intermediate was around $37 barrel on Thursday. With a barrel running 42 gallons, that's about 88 cents for a gallon of crude. By volume, that's about a fourth the cost of milk, according to the Bureau of Labor Statistics' Consumer Price Index.