Science

Why 18/8 (304) Stainless Steel Became the Global Standard for Food and Drink

Why 18/8 (304) Stainless Steel Became the Global Standard for Food and Drink

Why do premium reusable bottles use 18/8 (304) stainless steel? Discover what the numbers mean, how different stainless steel grades compare, and why 304 has become the world's most trusted material for food and drink.

How Safe is Stainless Steel?

How Safe is Stainless Steel?

Discover why food-grade stainless steel is trusted worldwide. Learn how chromium creates a self-healing protective layer that resists corrosion and helps make stainless steel one of the safest materials for reusable drink bottles.

BPA-Free Doesn't Mean Safe: The Rise of BPS and BPF

BPA-Free Doesn't Mean Safe: The Rise of BPS and BPF

Think BPA-free means safe? Research suggests many products now use BPS and BPF instead. Learn why material choice still matters.

Why Stainless Steel? The Science Behind Our Bottles

Why Stainless Steel? The Science Behind Our Bottles

PET plastic bottles leach antimony into your water — increasing 250x over 6 months. Discover why ecotanka has used pure stainless steel with no plastic interior since 2005.