The guys on one of the Brit forums said they use that stuff multiple times. They make a whole in the can, so they can poor it into a containter, and then use a sheet metal screw or large bolt to screw back into the hole when done. Said it keeps it fresh, and they can use whenever...I think they make two wholes, one on top, one on bottom...top one is a "vent" hole...I figured I try that. I've also heard you can use 2 pieces of saran wrap one on lid, one on top of can, and that will enable it to be reopened...not sure if either method works. <img src="/forums/images/graemlins/smile.gif" alt="" />