Best FLASK Guide! The Most Used Flask at a Laboratory 2020


A flask is a glass or steel made container that holds liquid. Usually, a bottle is used in laboratories with measuring units like liters (L) or millilitres (mL). The shape of the bottle depends on what it is used for. Bottles can be made in a way to heat the substance inside of them. 

Flasks usually mean laboratory flask. There are diverse types of laboratory flasks based on shape and usage. The most common types of container are:

  1. Erlenmeyer flask
  2. Florence flask
  3. Volumetric flask
  4. Sidearm flask 
  5. Round bottom flask
  6. Retort
  7. Dewar flask 
  8. Hip flask
  9. Casting flask 
  10. Laboratory flask
  11. Vacuum flask 


1. Erlenmeyer Flask

Erlenmeyer flask 

Buy Now

An Erlenmeyer flask is also familiar as a conical flask. Erlenmeyer flask is widely used in the laboratory. The feature of this flask is a flat bottom, a tapered body, and a cylindrical neck. The speciality of this flask is, it is easy to scale and mark with its large labeling field on the bottle. The Erlenmeyer flask is made of white ceramic, and it is compatible to work fired on. The thickness of the flask wall makes it usable with hot solutions, heat applications, and so on. Due to its conical aspect, the flask is best suited for mixing liquids and cleaning. 

2. Florence Flask

Florence Flask

Buy Now

Florence flask is specially made to deal with hot liquids. The regular Florence flask is made of borosilicate glass. The glass made the bottle compatible with the heat and chemical resistance. The feature of Florence flask has a round body and one long neck without a ground glass joint. On average, the Florence flask can hold 1-liter solutions. 

3. Volumetric Flask 

 Volumetric Flask

Buy Now

A volumetric flask is used for preparing liquids in exact volumes. The feature of this flask is the pear-shaped body and a long neck with a line on it. The volumetric flasks are used for quantitative research work and analysis. The speciality of this flask is, it can give a proper measurement of any quantities of solution or liquids. There are two classes of the volumetric flask in terms of accuracy, which are class A and class B. The level A flask provides the highest accuracy, whereas the class B flask can give approximate measurement that of class A flask. The class A flask comes in the blueprint, and class B comes in white print. 

4. Sidearm Flask

Sidearm Flask

Buy Now

The sidearm flask is used in analytical or organic chemistry tests. They are available in different sizes, and the sizes are inscribed on the flask. Sidearm flask has thick walls and a short tube for connection of a hose on the side of its neck. This flask is traditionally used for the filtering process. The sidearm flask is also known as a suction flask. 

5. Round-bottom flask

Round-bottom flask

Buy Now

Round bottom flasks are commonly used for chemical or biochemical research in laboratories. This flask is made of heat-resistant borosilicate glass. The round bottom flask feature has a round body and one or more necks with ground glass joints. There are different sizes available for round bottom flasks starting from 5 mL to 20 L. the size is mentioned on the glass. Now, two or three-neck round bottom flasks are available as well. 

6. Dewar flask

 Dewar flask

Buy Now

Dewar flask is used to hold a vacuum. Similar to a vacuum flask, the dewar flask consists of two flasks. The outer flask is constructed with stainless steel, which ensures durability and lightweight. The vacuum space between the two flasks are filled with high tech insulation. The durable dewar flasks are easy to carry and store low-temperature liquid gases. 

7. Hip flask 

Hip Flask 

Buy Now

A hip flask is a small kind of container that is used to carry a small amount of liquid. It is also like a fashion accessory to most people. Therefore, there can be seen a wide variety of hip flasks in shape, color, and design. Most trending hip flasks are Royal Selangor Erik Magnussen Hip flask, Nikka From The Barrel Hip Flask, Bar Craft Hip Flask, Harris Tweed Black Watch Hip Flask, Ettinger Saira Hunjan Hip Flask, etc. 

8. Casting flask 

Casting Flask 

Buy Now

Casting flask is used to hold molding sand. This container is a frame that comes without a top or bottom but with sides only. Usually, the casting flask is used to duplicate shapes items like metal, coin, jewelry pieces, and so on. There are two holding pins on the casting flask. Recently, casting flasks are also made of aluminum, which is easy to handle and use on a different purpose. 

9. Laboratory flask

Laboratory flask

Buy Now

Laboratory flasks or glassware are used for holding larger volumes compared to simple test tubes. There is a wide range of flasks that are used in the laboratory for different purposes. The most commonly used laboratory flasks are volumetric, conical, Erlenmeyer, conical, receiver, and tissue culture flasks.

10. Vacuum flask 

Vaccume flasl

Buy Now

Another name of the vacuum flask is a thermos. They are not only used in the laboratory but also on regular life for drinking hot or cold beverages and water. A vacuum flask is designed to keep drinks that are warm or cold in the refrigerator. A vacuum flask usually consists of two flasks. One flask is placed within the other. Both the incorporated flasks are joined at the neck. The gap between the two flasks is made to evacuate the air partially. Also, the evacuated air creates a near-vacuum, which reduces heat transfer. 

In different laboratories, types of flasks are used for a different purpose. Therefore flasks are designed in a way to make and hold the solution, measure chemicals, and, most importantly, contain chemicals that can have reactions like boiling, precipitation, and analysis.