The Hermetus Bottle Opener is the unique and classic way to take crown caps off bottles. ..and then re-seal them (for the over ambitious). This is particularly useful for King Browns and Maxi-Stubbies and is a big deal indeed for boutique beer lovers.
The seal works because of the rubberised under-side. You just slide it across the top of the bottle. And it also has little grippy teeth so it opens stuck twist tops too.
The Hermetus Bottle Opener is in polished steel and has usage instructions engraved on the top. It’s been made in Germany by the Monopol company for fifty years – and is unchanged. They didn’t need to.