I have a story in the new Fall 2013 issue of Whisky Advocate magazine that's not online. In it I compared a range of devices meant to chill down whisky. Teroforma Whisky Stones [buy] Teroforma Whisky Stones MAX [buy] Balls of Steel [buy] Skybar's Wine Chill Drops [buy] Tilt Spheres [buy] Steel Ice [buy] A glass put in the refrigerator A glass put in the freezer So, which one is best? I guess you'll have to pick up a copy of the magazine to know. If the story goes online, I'll share the link here.