Not quite the same bags, but they might be close. I wish Bestglide would put more technical information on their pages.
The beverage bag was included becuase the newest menus of MREs include stuff like milk shakes. Not something you want to make in a canteen. Ewww. But they are as tough as a good freezer bag, so you can certainly heat or rehydrate things in them. But I wouldn't go over 100C with one.
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-IronRaven
When a man dare not speak without malice for fear of giving insult, that is when truth starts to die. Truth is the truest freedom.