The Ti-Double 450 Mug is made of Japanese titanium using a historic manufacturing process. Durable and ultralight, the Ti-Double 450 is intended for daily use and camping sets. The mug’s double-wall insulation keeps beverages warm or cool. Please note: double-wall titanium cannot be used for cooking or placed over a heat source. The Ti-Double 450 Mug pairs well with the Titanium Spork or Insulation Lid.