Insane, yes! Necessary, absolutely not! The knobs that come with your CupFone are perfectly fine and will last forever! However, the mechanical device aficionado will appreciate the beauty of a WeatherTech-American-Made solid billet Aluminum knobs. Made out of American Made Billet Aluminum, right in our Bolingbrook Machine shop, by a couple of apprentice machinists that are learning the trade, we offer you our solid billet Aluminum knobs as an upgrade on your CupFone. These Solid Billet knobs are purely a "want" and certainly not a "need". If you love finely machined mechanical objects, you will love these Billet knobs. Priced like a couple of fancy cups of coffee, these billet knobs will provide satisfaction long past the 15 minutes your cup of expensive coffee will last. Cool is Priceless! Note: CupFone sold separately