The phrase "large gallon" doesn't make sense because "gallon" already means a specific amount of liquid. It's like saying "big big" which is redundant. Full definition
Place pork in a two large gallon sized ziploc bags (if you need to cut it into 2 pieces, that's fine). (drchristinemaren.com)
You'll want to pat the wings dry and place them into a large gallon sized Ziploc bag. (climbinggriermountain.com)
** Tip: If you don't have a pastry bag with fancy tips, then try using a large gallon sized food storage bag and snip off the end. (thecandidappetite.com)