I have used Mylar Bags for years and just love them.  I have written 2 posts dealing with using them. You can find these posts here and here.

However, I came across this video with a really unique idea.  The difference between this gentleman's device and mine is that you gasket area is much wider. I plan to experiment to see if my Food Saver device can work as well.  No matter, this is worth your time to view.