Hey Richard, another thing you can do when you can't find a brining bag would be to just inject the Boston Butt. I use Super Dave's recipe for pork: 1 cup apple juice, 1/4 cup apple cider vinegar, 1/2 cup sugar, 2 Tbsp kosher salt, 2 Tbsp Worcestershire sauce, 1 Tbsp rub, 1 Tsp garlic powder. Simmer until well dissolved, fully cool and inject with 1/2 oz. per pound.