No ice is needed with these Refreezable Iced Acrylic Plastic Martini Glasses. Made from Durable break-resistant acrylic plastic, sealed within the double walls is a non-toxic refreezable liquid. Simply place these refreezable Acrylic Plastic Martini Glasses upside down in the freezer a few hours before use - and say good-bye to drinks watered down by melting ice cubes. Refreezable Iced Martini Glasses are also great for Shrimp Cocktail, Mousse, Ice Cream, and Sorbet! Refreezable Iced Acrylic Plastic Martini Glasses, 7 inches tall x 5 inches diameter. To maintain the beauty and clarity of these fine acrylic plastic martini glasses, please hand wash.