Great, durable, strong and great to boil water and other liquids over an open flame. Holds hot beverages for a good hr or two and holds a cold beverage even longer. The led helps boil quicker.
Falconar22It is not recommended to use double-walled items to boil water/during the heating process (i.e. rupture risk). That said, should be okay to transfer even boiling hot contents into the doubled-walled item.