I visited that professional marketing group on Rainier ave..They specialize in going to fairs and shows to sell their products. The prices the had on bags were double what you can find on the internet.

The main thing, Dave, is to find a good "chamber" vacuum system. Then use a 5 mil bag.

I am lucky enought to have a professional chamber machine and use 5 mil bags. Even those bags can puncture sometimes but not often. The chamber machine is fun to watch work. It basically evacuates all the air out of the chamber that you bag is sitting in and then all of a sudden lets air rush back in causing the vaccum bag to collapse. Once you use one of these the Food SAver will seem like a toy.