Popcorn isn't the only inflated concession
Boston.com
Soda
At the TD Banknorth Garden, a 20-ounce souvenir cup, filled with soda, currently costs $4 and a 32-ounce cup is $5.

A two-liter bottle, like the ones shown here, holds about 67 ounces. You can buy four for $5 at Stop & Shop.

(Globe Staff Photo / Susan Chalifoux)