This product is designed for cold beverages. It is made of lightweight, highly transparent resin material. The push-button design allows it to be opened with one hand. It comes with a tea leaf filter stopper and a silicone strap. The recommended drinking temperature is below 50°C. Do not place any beverage exceeding 50°C inside the product. When filling with brewed drinks like tea, allow the temperature to cool before pouring. Failure to do so may result in burns, deformation, damage, or leakage of the product.