How to choose the Stainless Steel Material?

When choosing stainless steel for water bottles and cups, grades 201, 304, and 316 are the most common options.

Do you know what’s the difference of them?And how to test the grade of stainless steel by youself?

Known as surgical-grade stainless steel (18/10), 316 has higher nickel and molybdenum content, delivering superior corrosion & rust resistance (even for acidic drinks, saltwater, or harsh environments).

It's the premium choice for high-end cups, outdoor gear, and medical/healthcare related drinkware.

Usually use for the inner of bottle or cup.

Safety level:★★★★★

Pirce:★★★★★

Recommend: ★★★★(too expensive)

The most widely used food-grade stainless steel (18/8 ), 304 features great corrosion resistance, heat resistance, and safety.

It meets FDA, LFGB food contact standards, perfect for daily-use water cups, mugs, and general beverage containers — the top pick for most consumer and business needs.

Safety level:★★★★★

Pirce:★★★

Recommend: ★★★★★

As an economical choice, 201 stainless steel has lower nickel content and moderate corrosion resistance.

It’s budget-friendly but not ideal for long-term outdoor or humid use, and not recommended for food-grade drinking vessels that need strict safety standards.

In Henruy,it just use for the outer of bottle or cup,since the outer won’t touch the liquid directly.

Safety level:★★★

Pirce:★

Recommend: ★★★

In the next article, I will teach you how to distinguish these 3 types of materials,focus on WWW.HENRUY.COM.