Model DL-6 Quantity 6 piece(s) per pack Color Grayish White Material Marble Specification Get FDA certification; Can cool various drinks such as whiskey vodka and red wine etc.; A necessity for any bar! Great gift for people; Perfect for the connoisseur who enjoys beverage with a slight chill but doesn't want to water down the perfect balance of flavors in their chosen spirit; Handmade in Vermont USAwhich is one of the oldest factories of making Soapstore; Environmental friendly durable and won't scratch your glass; Each stone is cut by hand and is 7/8 cubed; Superior thermal mass giving it the natural ability to retain its temperature for extended periods of time. Non-porous odorless and tasteless will not absorb odors from your freezer like ice cubes do; Edges are rounded and Basalt stone is softer than glass so they will not damage barware (not recommended for use in cocktail shakers); For adult use only please keep away from children; If used for heating please use caution as the stones get hot quickly; Expect a 10 to 15 degree drop in beverage temperature just like it came out of a wine cellar. Instructions for use: Please wash stones before first use; Place stones in freezer for at least two hours. Then place stones in your glass (recommend 3 stones per 2-3 oz) and pour your whiskey or other chosen spirit over the stones to chill your drink Packing List 6 x Marbles 1 x Pouch