This flask is made to boil. Manufactured from strong borosilicate glass which can resist many corrosive chemicals and withstand high temperatures.  Clamp in image not included.

Specifications
Capacity (mL) 50
Material Borosilicate 3.3 Glass
Graduations (mL) N/A
Divisions (mL) N/A
Outside Diameter (mm) 50
Height (mm) 110