CenturyLink Arena in Boise, home to the ECHL Idaho Steelheads and the NBA D-League’s Idaho Stampede, has been forced to increase the size of their large beer cups, after being shamed by fan on YouTube. The stadium’s “small” beer held the same amount as the “large” one, $3 more expensive.
The culprit may be mislabeled cups from the vendor, rather than the arena actively trying to rip off customers. The Seahawks had a nearly identical problem at then Qwest Field in 2011.
We’d guess these are not the only two stadiums where this is true. Your best bet may be to go with the small regardless of venue