Ice balls made of Karelian soapstone from Finland. Since it has an extremely high cold and heat retention effect, it keeps it cold for a long time once it is cooled. Since it does not melt like ice, it does not dilute the taste of the drink, and it can be used not only for whiskey and juice, but also for beer and milk. In addition, taking advantage of the high heat retention effect, if you use it warm, you can keep the temperature of hot coffee. Since it is very airtight, it does not easily absorb dirt, and you can use it cleanly by simply washing it with household detergent.