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The ice cube is made of 304 stainless steel material, which is non-toxic and healthy for human.
STAINLESS STEEL CHILLING CUBES: Our metal whiskey stones are odor-free, non-poriferous, wear-resistant and do not get rust. Stainless steel ice cubes provide fast cooling to the beverage with the fast heat-conduction ability and keep cooling your drink for a longer time by maintaining its temperature.
KEEP THE REAL FLAVOR OF YOUR DRINK: Balancing the suitable temperature for every kind of alcohol is an art! While the best temperature for tasting red wine, whiskey, tequila, and other high-alcohol wines is 8-15°C and requires to use of 2-4 stainless steel ice cubes, for beer, colder is better so it requires 4-10 cubes. Ice chilling cubes do not spoil the quality and taste of the alcohol itself.

How to use and store the Whiskey Stones

* Before using for the first time, clean stones with water and dry completely.
* Place the stones in your freezer for a few hours. (Store the stones in the freezer to use whenever the spirits move you.)
* Put cold stones into a glass then cover with what you?re going to drink.
* Let stand for a few minutes, allowing the beverage to cool.
* After use, rinse well, allowing the stones to dry thoroughly before placing them back in the freezer.
* DO NOT try to chew or eat the stones.
* With proper use, these stones won?t chip your drinkware