6 weeks ago I smoked 2 butts. Ate one...turned out great. Put second 5 lb smoked porked butt in the freezer (unpulled). It was vacuum sealed. I plan to use boiling water method for reheat. Question: Is it best to put in cold water and let the meat come up to temp with the water..or.. bring water to boil and then put vacuumed sealed bag in water? Thanks for recommendations.