Xtech Whisky Chilling Rocks 100% Pure Soapstone Chilling Rocks with Muslin Carrying Pouch in Gift Box (Set of 18) A chilling alternative to drink-diluting ice-cubes, Chills 1-2oz drinks without affecting their taste, stays cold for at least 30 minutes Made from 100% soapstone that will chill your drink without diluting it Stones are nonporous, so will not impart any flavors or odors to your drink Soapstone is not terribly hard and the edges are rounded, so they will not scratch your glasses. Great gift for whisky drinkers, includes; Set of 18 stones, muslin storage bag & gift box