As a German, it’s a real (non joke) product which is actually somewhat useful for cleanly opening eggs. The word though is a bit of a joke advertising thing, Germans will understand it no problem (those words are vastly easier to understand than you might think, you just need to understand the parts) but it’s definitely not a “real” word that anyone would use in a non joking way. It’s basically telling the prospective buyer: “This is a real clever product that someone put enormous thought into designing and you’ll impress everyone if you have it”. Basically people will read it, laugh, and be like “ok it opens eggs”.