It does not melt, does not fade, and does not damage the quality and taste of the wine itself.The body is filled with frozen liquid, the freezing effect is more durable, and it can be used repeatedly.Stainless steel body, good heat transfer effect, can be used for a short time after freezing.Easy to clean, easy to use, easy to store.Food grade 304 stainless steel, no rust, non-toxic, safe and healthy.Material: 304 stainless steelSize: 4pcs , 6pcs , 8pcsuser's guidance1. After cleaning, put it in the refrigerator for 3-6 hours before use2. When using, take it out directly into the cup3. Wait about 2-3 minutes to enjoy4. After cleaning, put it back in the refrigerator to freezePackage Contentsstainless steel ice cubes* 1 (excluding other demo products)notes:Please allow 1-3mm error due to manual measurement.Due to differences between different monitors, the pictures may not reflect the actual color of the item. Thanks!