This whiskey ice ball maker is made of durable premium silicone material, BPA-free,Heat resistant -40 to 230 degree centigrade ,safe for freezer and microwave. Non-stick performance makes it very easy to clean, dishwasher safe. Large size ice ball melts slower than the conventional ice cubes, keeps drinks colder, longer, and with less dilution.Perfect to chill your whiskey, cocktails,scotch, rum, tequila,vodka, vourbon, mixed and non-alcoholic drinks. Easy to use,their unique built-in funnel design enables you to easily fill the water without using an extra funnel.Every round ice ball mould is individual,easy to carry,even a small corner space can be placed perfectly.Leak-free makes it always create nice full ice balls. 1 location includes the shipping cost to US.