Sparq Soapstone Whiskey Rock/Wine Stone/Coffee Stone, Set of 12 Set of 12 soapstone whiskey rocks; 3 rocks measuring 1-1/4-inch and 9 rocks measuring 15/16-inch, cubed Sustain temperature without dilution; stones will never wear out or lose the ability to hold temperature Soapstone is non-porous, odorless and tasteless; will never harbor bacteria Can be frozen or heated to use with bourbon, whiskey, scotch, white wine, champagne, coffee or tea Dishwasher safe