Interesting bit about the Mylar bag not pulling a vacuum. I hadn’t tried it yet but will take your word on it.
This YouTuber found a way to vacuum seal mylar bags with a FoodSaver:
Thanks for your post! I was just going to post a similar question. Yes, the freeze dried machines I have looked at - the least expensive - are about $2,000...pricey but if you had one you might be able to use it for some commercial undertaking. Possibly rent it out? People come to your place to use it...
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