The arena also had in place larger, 24-ounce cups.
Earlier this week, a YouTube video surfaced that showed the difference in the amount of liquid in what the arena called small and large beers.
The difference appeared to be very little. Fans and patrons reached out to let their dissatisfaction known.
The arena sent out a statement after the uproar that said:
"It was recently brought to our attention that the amount of beer that fits in our large (20-oz) cups also fits in our regular (16-oz) cups," Eric Trapp, president said. "The differentiation in the size of the two cups is too small."
"To correct that problem, we're purchasing new cups for the large beers that will hold 24 ounces, instead of 20, for the remainder of this season to provide better value to our fans. As we do every offseason, we'll evaluate our entire concessions menu for next season over the summer."
On Tuesday, four fans filed a lawsuit against the arena claiming they had committed fraud by knowingly selling the large beers for more money, even though the small and large beers were almost equal.
The price of a small beer remains the same at $4.