Sparq Soapstone Whiskey Rock/Wine Stone/Coffee Stone, Set of 8 Set of 8 soapstone whiskey rocks; each rock measures 1-1/4-inch, cubed Sustain temperature without dilution; stones will never wear out or lose the ability to hold temperature Soapstone is non-pourous, oderless and tastelss and will never harbor bacteria Can be frozen or heated to use with bourbon, whiskey, scotch, white wine, champagne, coffee or tea Dishwasher safe