This product is manufactured from high-quality heat-resistant durable glass. You can use these products for a long time. Also, this kitchenware is dishwasher safe. Every element that glass is made of is natural and always has been.  The results from a recent study are in, and show that consumers across the board agree that glass is a safe material. Glass is made from all-natural, sustainable raw materials, is 100% recyclable, and can be recycled endlessly with no loss in quality or purity.  Glass kitchenware leads to health benefits because glass is good for your foods and beverages. Since this glassware BPA-free and lead-free, it is healthy and safe.