If they made a biodegradable vacuum bag! I'm not sure how they would hold up to use them for sous vide cooking. They are no worse than the prepared meal in mylar pouches. And empty take up less room and weight of canned food. And where I live we can recycle the vacuum seal bags along with other plastic bags. And vacuum packing your food saves space in your cooler of fridge, which ever way you choose. Also, I find it easier to defrost the food in the vacuum pack bag the thinner the substance is inside the vacuum bag. From what I read about the reusable vacuum bag is they only recommended to use them a few times and replace them.