This is the bottle opener you will see in every bar in Japan. It is foldable and compact, it opens the cap discreetly and above all, it recaps your small bottles to preserve their bubbles.  The upper part of the bottle opener will prevent you from damaging your nails when you open a can.
The essential in your personal bar, for small sodas for cocktails, or to take on a picnic to uncap and recap the small bottle of beer. 
 
Inside the lid, the small blue wheels fit under the mouthpiece of the bottle and the rubber surface has a suction cup effect to adhere perfectly to the bottle. Absolutely airtight, once recapsulated, the bottle can be transported without worries.
Here is a short video Youtube (in English) of a test carried out with an open and recapsulated beer bottle for three days. 
 
So practical and efficient, you can't live without it!
Made in Japan. Tested and adopted by DOMA.