Groupon offers the SPARQ USA Whiskey Stone 9-Pack for $9 plus $5.50 for shipping. That's the lowest total price we could find by $10, although we saw them for $4 less during Cyber Monday week. These soapstone "ice cubes" can be chilled, then placed into a drink to keep your beverage chilled without diluting it with melting water. Deal ends January 10.