Success

When I bought the Whisky Rocks I tried them with gin and tonic and they were just not right; G&T needs to be big and full of ice. If you drink it quickly the ice will not be melting and you have a chance to reuse them with a second drink.
Tonight I used a couple with a single malt and just a splash of water. the rocks certainly cooled the drink a little but did not freeze it. As it warmed up the whisky taste subtly changed. By the time I had finished it the rocks were just stone, not cold at all but the whisky was still good. My bag of stones has eight more cold ones so there is still a chance for a refill