【How to Use/Features】 Simply put it in the freezer to chill (2-4 hours). It's ice that doesn't melt, so it won't dilute your drinks. No need to make ice with ice trays or ice machines; just wash and reuse. *This product is intended to slightly reduce the temperature increase of cold drinks and has a low effect on cooling room-temperature drinks. Brand new, unused. If purchased during the New Year's holiday period, it will be shipped after January 4th. Price reductions are not accepted.