flask , reaction vessels 10,000 ml

Laboratory flasks are vessels or containers that fall into the category of laboratory equipment known as glassware . in laboratory and other scientific settings , they are usually referred to simply as flasks come in a  number of shapes and a wide range of sizes , but a common distinguishing aspect in their shapes is a wider vessel " body" and one (or sometimes more) narrower tubular sections at the top called necks which have an opening at the top. laboratory flask sizes are specified by the volume they can hold, typically in metric units such as millilitres (ML) or liters.

Flasks can be used for making solutions or for holding, containing, collecting, or sometimes volumetrically measuring chemicals ,samples, solutions, etc . for chemicals, reactions or other processes such as mixing, heating , cooling, dissolving, precipitation , boiling ( as in distillation), or analysis.