As motocrash suggests, vac sealing is absolutely the best way. Personally, I put in vac bags after the meat has cooled with a bit of the juice, vacuum seal it, then freeze it. Either way, the key part is adding a bit of the juice to the meat in the bag. Simmer in the bag to reheat wold be the best reheating method.
If the meat will be eaten fairly quickly after freezing (within a month or two), you could use zipper freezer bags. I would place the meat and juice in the bag, then submerge in water up to it's neck to get out as much air as possible and zip it up.