These are Pucs. The word's first rechargeable ice cubes.
"A set of Pucs will chill steadily, evenly, and stay cool for quite a while – without the added water or unwanted flavors of tap water ice."
http://bit.ly/15Kig4I
"A set of Pucs will chill steadily, evenly, and stay cool for quite a while – without the added water or unwanted flavors of tap water ice."
http://bit.ly/15Kig4I