The Teroforma Whiskey stones are inspired by an old Scandinavian tradition to chill whiskey and other spirits to optimal drinking temperatures without watering down your drink. This allows your to take your time and enjoy your glass from start to finish. These soapstone beverage cubes are milled in Vermont at the oldest soapstone workshop in the USA. Just pop them in your freezer for a few hours, and then drop them into your glass. Easy to clean by rinsing in water then drying. The Teroforma Whiskey For Two Set is a must have for whiskey lovers. The set includes two machineblown crystal tumblers. These tumblers were created in collaboration with glassblowers from Rona in Slovakia which has been making some of the world's finest mouthblown crystal since the 1892. This glass set paired with 6 whiskey stone beverage cubes to keep you whiskey colder longer without watering it down.