French press & cookware | Ziruma Help Center

French press: materials and safety

Every component is stainless steel — no plastic hidden inside. The interior and every surface that touches your coffee, including the filter, is surgical-grade 316 stainless steel, the same material trusted in medical instruments. Our steel products are independently lab tested, and testing reports are available on request. The measurement markings are built into the steel interior.

Last updated on Oct 22, 2026

French press: the filter

The filter is a 4-layer assembly of metal screens and mesh, designed to last. If it ever needs replacing, write to us at help@ziruma.com and we'll help you out. Use a coarse, even grind — fine grinds can slip through the mesh and leave sediment in the cup.

Last updated on Oct 22, 2026

Why Surgical Steel 316 in your pans?

Surgical Steel 316 is a high-grade stainless steel known for its superior resistance to corrosion, rust, and staining. Thanks to its non-reactive composition, it does not leach metals or affect taste, making it safe for food contact. It is highly durable, easy to clean, and resistant to bacteria buildup, making it a reliable and long-lasting choice for everyday and kitchen use.

Last updated on Oct 22, 2026

How do I clean stainless steel products?

Stainless steel may develop stains from heat, minerals, or cooking oils. These are normal and easy to remove. - Rainbow or blue marks: wipe with white vinegar or lemon juice, rinse, and dry. - White spots or chalky residue: simmer a 1:1 mix of water and vinegar, then rinse. - Brown or burnt stains: use a baking soda paste or a stainless-steel safe cleaner and scrub gently. - Streaks or cloudy film: rinse with vinegar and dry with a soft cloth. Avoid steel wool or bleach, use medium heat, and always dry the pan after washing.

Last updated on Oct 22, 2026