What Grade of Stainless Steel Do You Use for Your Bottles: 304 or 316?

When choosing a stainless steel bottle or tumbler, one of the most common questions we hear is about the grade of stainless steel—specifically, whether we use 304 or 316. It's a great question, and the answer matters for both safety and performance.

At CUPPARK, our stainless steel drinkware—including the popular CUPPARK 600ml High Appearance Quality 304 Stainless Steel Coffee Cup with Handle—is made from 304 stainless steel. This grade is widely recognized as the standard for food-contact products across the globe, offering excellent corrosion resistance, durability, and a safe drinking experience for everyday use, travel, sports, and outdoor activities.

Why 304 Stainless Steel?

304 stainless steel belongs to the 18/8 family (approximately 18% chromium and 8% nickel). This combination gives the material good resistance to rust and staining, making it ideal for holding water, coffee, tea, and other beverages for extended periods. It is the same grade used in many premium kitchenware and food-processing applications, so you can trust it to keep your drinks pure and your bottle long-lasting.

What About 316 Stainless Steel?

316 stainless steel contains additional molybdenum, which provides even higher resistance to chlorides and marine environments. However, for typical daily use—such as carrying coffee, water, or smoothies in a bottle or tumbler—304 stainless steel is more than sufficient. It offers the right balance of quality, weight, and cost, and it is the preferred choice for most premium drinkware products.

Certifications and Quality Assurance

CUPPARK is a China-based OEM/ODM manufacturer with ISO9001 certification, and our factory uses eco-friendly materials and processes. Our 304 stainless steel bottles and tumblers are designed to meet the needs of customers in over 30 countries. While we cannot list every certification on this page, you can always contact our team for detailed material documentation.

For this specific model—the 600ml Lilyan coffee cup—the body is crafted from 304 stainless steel, ensuring a sustainable, non-inverted, and well-stocked product for your active lifestyle. It is available in a variety of colors and can be customized with silkscreen, laser engraving, water decal, heat transfer, or embossed logos.

The Bottom Line

We confidently use 304 stainless steel for our bottles and tumblers. It is safe, durable, and the industry standard for high-quality drinkware. Whether you are heading to the gym, camping, or driving to work, our CUPPARK 304 stainless steel cups are built to serve you well.

If you have more questions about materials or customization, feel free to reach out to us at [email protected]—we are happy to help.