The BUBBLES valve and cooler set should be stored in the freezer before use - it achieves optimal performance after 2 hours of cooling. Its flexible shape allows for the cooling of 750 ml bottles, reducing the temperature of the wine from 20°C to 9°C in just 20 minutes. The bottle-adapting shape allows for safe pouring of the wine and maintains the ideal temperature for up to 2 hours. Made from easily cleanable material, the champagne/sparkling wine stopper keeps freshness for several days and is compatible with all types of sparkling wine bottles, ensuring 100% airtight sealing. It features an extremely durable and elegant aluminum finish and is easy to use.