The Botella Steel Lab: Decoding SUS 304 & SUS 316

Discover these two unrivaled insulation metals that keep your hydration safe, cold, and rust-proof.

SUS 304 Stainless Steel

SUS 304 (18/8) stainless steel bottle is a premium, food-grade, durable, and corrosion-resistant containing 18% chromium and 8% nickel. These non-toxic, BPA-free, and generally non-magnetic bottles are ideal for daily hydration and storing both hot and cold beverages without leaching chemicals.

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When you choose a bottle made from SUS 304 stainless steel, you are selecting the industry standard for quality and safety. The "18/8" designation refers to its specific alloy composition of 18% chromium and 8% nickel. Here is why that matters for you:

The Role of Chromium (18%)
Chromium is the key element that gives stainless steel its name. It creates a passive layer on the surface that protects the steel from rust and corrosion, ensuringthe bottle remains durable and stain-free even after repeated use.

The Role of Nickel (8%)
Nickel enhances the alloy's strength and toughness. It also contributes to the material's formability and its signature shine. Importantly, this specific composition is what classifies it as food-grade.

BPA-Free

Stainless steel does not require a liner and not containing BPA that could leach into the drinks.

Taste Purity

Stainless steel not impart any metallic flavors into the drinks, keeping the taste pure and clean.

Non-Magnetic Properties

Bottle shaping create small magnetic spots, but this does not affect its safety because it is non-magnetic.

Double Insulation Wall

Superior temperature retention, keeping drinks hot for > 10 hours and cold for > 20 hours.

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Vacuum Flasks

SUS 304 Stainless Steel

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SUS 316 Stainless Steel

SUS 316 stainless steel bottle is made from a premium alloy that represents the highest standard of food-grade and medical-grade steel. The numbers "18/10" refer to its specific composition: 18% chromium and 10% nickel. However, the key ingredient that truly sets it apart is the addition of 2–3% molybdenum.

When you choose a bottle made from SUS 316 stainless steel, you are priotizing medical-grade where absolute hygiene and durability are non-negotiable. The "18/10" designation refers to its specific alloy composition of 18% chromium, 10% nickel and addition of 2–3% molybdenum. Here is why that matters for you:

The Role of Nickel (10%)
The slightly higher nickel content (compared to 8% in SUS 304) adds extra stability, makes the material easier to form into shape, increasing its resistance to acidic and alkaline substances.

The Role of The Molybdenum (2–3%)
Molybdenum is a heavy metal that strengthens the passive layer of chromium oxide. It specifically targets a weakness of standard steel: vulnerability to chlorides (salt).