Verified Buyer Reviewed by funkymama from New England, USA on Monday, December 26, 2016
Did not work. It says on the package that they don't work on cans opened with safety can openers. But our cat food utilizes pull-tops, and though I suppose that might make a difference, and that these could work with cans opened by a can opener, I don't see how. The "seal" created (by pushing this thing down into a concave shape) began slowly letting air back in right away.