What is the use of a flat-bottomed flask in a chemistry laboratory?

Flasks are used in laboratory settings (including chemistry labs) for a variety of purposes. A flask may be used to measure the volume of liquid samples and solutions or heat, cool, dissolve, mix, or boil liquids. Flasks are most often made of glass or plastic and can come in a variety of shapes and sizes. Typically, a flask is wider at the base than at the neck, with an opening at the top. Flasks can have either rounded or flat bottoms.
 

A flat bottomed flask is used in settings where the flask will be set on a level surface, rather than in a clamp or bowl. On the other hand, a flask with a round bottom will either sit in a bowl or be suspended above a surface using a clamp.