The cutlery is made of pure titanium, one of the most bio-compatible metals. Titanium is completely non-toxic and non-allergic to the human body, free from heavy metal elements, and is therefore widely used in the health industry for medical devices, biomedical implants, etc.
Titanium is much more resistant to acid and alkaline corrosion than stainless steel, let alone rust. Even though it is stored in the deep sea for 100 years, titanium probably won't rust.
Aufgrund seiner geringen Dichte ist Titan etwa 40% leichter als Edelstahl mit gleichem Volumen.