My grandmother gifted me an enamelware set for the gypsy wagon, including a percolator. The perc came with a plastic top, which meant that the hot coffee was getting run through plastic every time we used it. While we were at Lehman's, I happened to notice this one-size-fits-all percolator knob on the shelf. $3 later we have a glass knob and the plastic knob is history. It's so great to find items like this that allow you to improve or extend the life of your stuff. And a cool retro, plastic-free package to boot!