I have a large cookie tin (costco butter cookies) and a hot plate. I was looking at cutting a hole in the lid of the cookie tin and attaching a dryer pipe. Then filling the cookie tin with some wood chips and placing on a hot plate to generate smoke to feed into the smoker. My primary question is if a cookie tin is (tin in general) is safe (I would do a burn in first)? Is the cookie tin container likely to thin?