If you've shopped for a stainless steel bottle, you've probably seen "18/8" mentioned in the description. Here's what it actually means and why it matters.
What "18/8" Refers To
18/8 describes the alloy composition of the stainless steel: 18% chromium and 8% nickel. This is also known as Type 304 stainless steel, the most common food-grade steel used in bottles, cookware, and kitchen equipment worldwide.
Why Chromium and Nickel Matter
Chromium is what makes stainless steel "stainless" — it forms a thin, invisible oxide layer on the surface that resists rust and corrosion. Nickel adds strength, ductility, and further corrosion resistance, while also giving the steel its bright, polished finish. Together, 18/8 steel is durable, non-reactive, and safe for direct contact with food and beverages.
Is 18/8 Steel Safe?
Yes. 18/8 (304-grade) stainless steel is considered food-grade and is the standard used in commercial kitchens, hospital equipment, and drinkware globally. It doesn't leach chemicals into your food or drink the way some plastics can, and it's BPA-free by nature since no plastic lining is involved.
How to Check a Bottle Is Genuinely 18/8
- Look for the grade explicitly stated as "18/8" or "304" in the product description
- Check for BIS certification (mandatory quality standard for stainless steel products sold in India)
- Avoid unbranded bottles with no material grade listed at all — lower grades (like 201 steel) are cheaper but less corrosion-resistant and not always food-safe
18/8 vs Lower-Grade Steel
Some budget bottles use 201-grade steel, which contains less nickel and more manganese. It's cheaper to produce but more prone to rust and staining over time, especially with acidic drinks. If a listing doesn't specify the grade, it's worth asking before buying — or choosing a brand that states it clearly.
Every Nelcon bottle is made from 18/8 food-grade stainless steel and is BIS certified, so you don't have to guess. Browse our full stainless steel bottle range.
