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Icelandic lava stone.

Each stone is 2.2 x 2.2 x 2.2cm (0.87").

Wash the lava stones in warm water and dry them. Put the stones into the velvet storage bag and place it in the freezer for at least 4 hours.

For optimal cooling, use 3 stones for every 6CL/2OZ, place them in the drink and let it cool for 5 minutes before consuming it.

Repeat the Process for next time. Use the tong for your convenience.

Please be aware not to swallow the stones. Keep the stones away from children.