The Alessi Pop-up Bottle Cap Remover:

The Alessi pop-up Bottle Cap Remover was designed by Giovanni Alessi Anghini and is a simple and ingenious item. To open a bottle simply place the opener onto the top of the bottle, press down as if to put the cap on, and hey presto! the cap is removed and held by a magnet inside the bottle opener. The outer shell of the bottle cap remover is made form polished stainless steel and would look great in any bar or home and is sure to impress.