Stainless Steel Ice Cubes Chilling Stones Rocks Reusable for Whiskey Wine Drink Features: High Quality-With Natural Antibacterial Properties stainless steel material, they are durable, dishwasher safe. Chilling stones contain a food grade chilling gel in the center, retains cool temperature without affecting your drink's flavor. Designed to be reusable. Unique gift for spirit drinkers. Easy to use and clean. The rounded corners won’t scratch the glass or hurt you while drinking. Notice: Please place the cubes in freezer for 4 hours or more before use. Specifications: Materials: Stainless Steel *Plastic Case Color: Silver Package includes: 4/6/8 * Stainless Steel Chilling Cube 1 * Storage Box 1 * Tongs