Heat and cold resistant: This glass teapot can be heated directly over an open flame or placed in the refrigerator, as it withstands temperatures from -20°C to 150°C. The small glass teapot is enlarged and thickened, making it easier to hold the water and pour with less effort. Teapot with filter details: Capacity: 550 ml. This teapot also features a stainless steel infuser, making it ideal for preparing and serving hot or cold beverages such as coffee or tea. The lid and filter are made of 304 stainless steel, and the lid's size is precisely molded. When the glass teapot with infuser is tilted, the lid is less likely to fall off or leak. The filter retains solids in the glass teapot while the water is poured. The square glass teapot is easy to clean with a gift brush. The smooth surface of a clear glass teapot leaves fewer stains than silicone or other materials. Therefore, please rinse with warm water after use to keep it clean and like new. Dishwasher safe, but hand washing is recommended. If you have any questions about the product, please feel free to contact us. We will do our best to help you find a solution.