silicone, , soft, and long service life. Mainly used to be stuck in red wine glasses or beverage bottles, when we drink, identify each customer's glass silicone glass markers. your glass or bottle with these markers, special party theme red wine glass cup markers. Stick this cup markers on your wine glass, and you can quickly locate your drink in the jumbled jungle of the party. Perfect for parties, cocktail hours, dinners and many other places.