fishstik: I have the Dougcare price sheet and am about to order some chamber vacuum bags...What thickness did you get? 4.0mil or 3.0mil? Did you ask them about the difference>? I used up the 4mil ones I had and never have tried a 3mil. The 3mil are really alot cheaper. I know the heavier bags are more resitant to punctures. They also have bags with a special barrier of some kind..I'm not very educated about the bags as there are many choices. My commercial chamber machine was made in Switzerland and weighs over 250 lbs and can't be moved easily and takes up alot of counter space about like a big microwave but wow what a beautiful way to preserve food.