On The Rocks ice cubes: made from soapstone
Like your drink on the rocks? How about literally. On The Rocks by Ari Turunen are ice cubes made out of soapstone. Put them in the freezer overnight, and they will keep your drink cool (and look cool). The best part about them literally being rocks is that you can put them in the oven as well, and yes, they will keep your tea warm.