Oh great, a slow cooker liner. So the big family secret that got passed down through three generations was... a plastic bag. Grandma survived the Depression and rationing just so we could wrap her pot roast in something you throw in the trash after one meal. I bet she's looking down from heaven wondering why nobody just washes the crock. Half the flavor of a good roast comes from the stuff that sticks to the bottom and browns up anyway. You don't get that with a liner, you get meat that sat in its own juice for eight hours like it's in a hot tub. Next thing you know someone will say they improved her pie crust by buying it frozen.