Welcome to our factory which produces high quality vacuum flasks. Our 500ml 316/304/201 Stainless Steel vacuum flask is a must-have for on-the-go hydration. It is perfect for keeping your drinks hot or cold for hours while you travel, hike, or take part in other outdoor activities. Made of high-quality 316/304/201 Stainless Steel material, this vacuum flask is durable and corrosion-resistant. Its wide mouth makes it easy to fill, pour, and clean. Its vacuum insulation technology ensures that your drinks stay at their desired temperature. Order now and enjoy the convenience of this long-lasting, easy-to-use product from our factory.