Are stainless steel thermoses safe for acidic drinks like lemonade?
Depends on the product. New, certified cookware is low risk. Old or imported ceramics may leach heavy metals.
What's actually in it
Heavy metals like nickel, chromium, lead, and cadmium can leach from cookware, ceramics, and food storage containers. Acidic foods speed up leaching.
Stainless steel can release nickel and chromium. Older or imported ceramics may contain lead in the glaze. Even "food-safe" products can leach trace amounts under repeated use and heat.
What the research says
A 2026 study in environ sci technol looked at chemical exposure from everyday products and found: Impact of Textile-Derived Micro- and Nanoplastics on Brain Health: An Emerging Bayattork M(1), Rahman M(2), Hossain MI(1), Zhang Y(1), Haque ANMA(1), Kim B(2),.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Impact of Textile-Derived Micro- and Nanoplastics on Brain Health: An Emerging Environmental Risk. | Environ Sci Technol | 2026 |
What to use instead
Browse our vetted, non-toxic alternatives. Every product is third-party certified.
Shop Non-Toxic Kitchen