I collect these from several individuals as part of a fundraiser where they are sold and the profits split between Shriners Hospitals and local veteran organizations.  There will be all brands and varieties in this lot, with all of them being the metal variety.  Here is the quick math I ran on these.  12 lids weigh 3 ounces.  With 2 pounds, the low ball guess is a total of 125  lids.