DB-Tech Whisky Chilling Rocks Gift Set,Grey - Set of 9 Includes a set of Chilling Rocks, and a Muslin Storage Pouch - Beautifully Boxed and a great Gift item! Made From 100% Soapstone: Soapstone maintains its temperature for long periods of time, and is Regarded As Safe (GRAS) by the FDA. Soapstone is made up of talc which will not react to water, alcohol and or other drinks These Rocks have extremely soft finish and are surprisingly very lightweight - Dimensions: 2 x 2 x 2 CM Easy to use: just wash the Rocks and place them in the freezer to use them at anytime Chilling Rocks are not meant to cool as a drink as quickly or as much as ice. They are intended to provide a slight chill-between 8 and 15 degrees-that will to take the edge off without dilution.