I dont do a lot of brining...but when I do I use 2.5 gallon ziplock bags. They are big enough for a full size turkey
at least the size I get...I never have seen anything over 20 pounds
Chargriller Super Pro with side firebox
I'd like to be remembered as one of those "larger than life" people, but as I'm only 5'6" I just work on being *wider* than life.
(Pedro Moura Pinheiro, a funny guy)