Last Thursday, stadiums across the country opened their doors and baseball season started. With it comes the arrival of America's favorite pastime, game-day eats, and the ballpark beer scam.

What is the beer scam? It's the stadium's way to make a quick buck on beer-guzzling fans. Many places offer three sizes of draft beer: small ($6), regular ($8), and large ($10). However, the ounces are not listed, and the average concession stand worker doesn't know how much beer they hold.

After watching a video that clearly shows the small and regular sizes are almost identical — with the only difference being the shape of the glass — I decided to investigate and figure out what exactly is the distinction between these beer sizes. To find out, read more.