How do shungite cubes differ from ordinary ice when chilling whisky? — Whiskey cubes polished from shungite

The main difference, which follows from the nature of the set itself: shungite cubes (Karelia) do not melt, so they do not dilute the drink. According to the manufacturer's description, chilling whisky with ice loses flavour quality, and ice chills the drink for only 10 minutes; shungite, per the same description, cools whisky to the ideal temperature (about 19 degrees) and reveals the full flavour bouquet. These statements are the manufacturer's claims; there are no measurements on the product card to confirm them.

How to use: before use, place the stones in the freezer for a couple of hours and add 3 cubes to the glass; the set includes 9 cubes and a pouch. According to the card, the stone does not absorb odours and does not react with drinks or cleaning agents. How long the cubes stay cold is not described in more detail on the card.