This 125ml, narrow mouth flask features a smooth rim and heavy, uniform wall thickness. Borosilicate glassware is a lower cost, ISO certified, alternative to PYREX brand. The flask is printed with capacity, graduations for approximate volume, and a marking spot. Stopper size is #5.
The Erlenmeyer Flask is used to heat and store liquids. The advantage to the Erlenmeyer Flask is that the bottom is wider than the top so it will heat quicker because of the greater surface area exposed to the heat.