Whiskey stone is made of reusable natural granite, which is safe and environmentally friendly.They will not dilute your drink like ice and let you enjoy the original flavor at any time. Whiskey rocks chilling stones that dries quickly after washing can be used multiple times and keeps it cool for a long time without the trouble and bad durability. Our whiskey cubes stones are packed in beautiful wooden boxes and equipped with flannel bags and tweezers. It's a great Father's Day gift