13Deals continues to offer this 9-Piece Whiskey Stone Set for $9.99. Coupon code "WHISKEY40" cuts it to $5.99. With free shipping, that ties last week's mention as the best price we've seen for this set. (It's also a current price low by $1, although most merchants charge $9 or more.) Simply place the stones in the freezer before use and they are purported to keep your drink cool without diluting the flavor. It includes a muslin pouch for storage.