It is design with 100% high quality food grade silicone and will not add any extra flavor or smell to your drink.Heat resistance: 220C,cold resistance: -40C,BPA free,suitable for refrigerators, microwave ovens.You can put it in your dishwasher directly after you use it. .Cocktail Beverage Chiller: Keep your cocktail or beverage chilled longer without watering down your drink. Nothing is worse than when you have the perfect cocktail or beverage recipe and half way through your drink, it has become diluted and doesn't taste the same. .Easy Release: Silicone provides flexible molds for a variety of uses. The novelty large square mold shape can be used to freeze soup bases, chocolates, ice coffee, and juices for popsicles. .New Pore design, to prevent freezing overflow. .