The functionality of science glass with the industrial ruggedness of concrete. The 250ml boiling flask is constructed of scientific grade-glass that can withstand both extreme hot and extreme cold liquids. The concrete base both cradles and supports the glass flask, and can serve as a warming or cooling plate. It's perfect as a coffee creamer, gravy dispenser or salad dressing. It can also serve as an individual serving piece for soup, hot chocolate, coffee, tea, water, lemonade, and other beverages.