All of the above is great information, but I have an additional thought.
When we have left over soup, stew, spaghetti, or anything else that is liquid or very soft, I place it in portions into a square or rectangle container, put it in the freezer, let it freeze, and then vac pack the "brick".
Later, when we want to eat it, I place it into the frig, still in the vac pack, allow it to defrost, and then warm it, still in the bag, in water. I place the sealed bag into cool tap water, put the pot on the stove with the bag in the water, turn the burner to high, wait for it to boil, and then let it go for about 5 minutes.
Also, the "bricks" you have vac packed, will stack nice and neat in the freezer...