When you need to keep your wine at the perfect temperature, simply soak the Magisso Wine Cooler in cold water for 60 seconds. As the water evaporates, it naturally cools the item and keeps contents cool for up to 4 hours. The longer the item sits in the open air - the cooler it becomes. To personalize, use chalk to create your very own design or write a message on the side of the matte black exterior. Add your favorite bottle of wine and enjoy.