How should I prepare shungite cubes for first use and how do I care for them? — Whiskey cubes polished from shungite

Preparation according to the card: before use, place the stones in the freezer for a couple of hours, then add 3 cubes to the glass; a pouch is included in the set. According to the card, the stone does not absorb odours and does not react with drinks or cleaning agents. The card has no instructions on first washing, care or storage.

General recommendations (not a manufacturer's instruction): after use, rinse the cubes with clean water and let them dry; inspect the cubes before each use – if they have chips or cracks, it is better not to put such stones in a glass, because sharp edges can damage the glass or become a source of small particles in the drink; the pouch from the set is convenient for storage.