304 stainless steel.The stainless steel water bottle is made of high-quality material, which can keep heat and cold, and is durable. Our insulated flask is available in gradient blue and pink colors for you to choose from, and you can also design a cup with your own pattern. The screw-top water cup has a tight mouth and no water leakage. The thickened bottom design makes this water cup more sturdy and durable. The capacity is 500ml. Our sports water bottles are the perfect size and easy to carry, making them ideal for outdoor activities such as camping, beaching, outings, spring outings, travel, daily work, and more.
