I have a Food saver vacuum packing machine.
I have actually had it about as long as I have been backpacking.
The bags are tough. I have prepared food a couple ways with them. one is to pour boiling water into the bag with noodles or dehydrated food, to rehydrate.
the other which I do rarely while backpacking, because it is for solid, non dehydrated, heavy food. but it works for car camping quite well, is to put the bag still closed into a pot of boiling water, this will cook steak, turkey, mashed potatoes, corn. So these bags can either cook, or rehydrate food.