On The Rocks are 9 Gabbro rocks that replaces your ice cubes.

Chill the Icelandic Gabbro rocks in a freezer for at least two hours.
Place 2-3 rocks in a glass and pour the drink.
The drink is chilled without being diluted.
2-3 rocks are sufficient to cool a double measure.

Rocks for cooling your drink, chill without diluting! 

On the Rocks: Icelandic design
- from Iceland!