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Know Your Lab Glassware: A Guide to Glass Beakers, Test Tubes, And Flasks

Indispensable in biological and chemical laboratories, lab glassware is traditionally made of heat-resistant glass but is now produced in plastics and plastic coated glass. Plastic ware is less expensive, less prone to breakage, and serves many purposes in the lab. Plastic coated glass is used for chemicals that present a danger if the glassware breaks. The plastic coating will hold the chemical until it can be properly disposed of. Glass is still preferred for many uses due to its transparency, heat resistance, and chemical stability.

The most commonly used glass is clear, borosilicate glass, also known as Pyrex, that can withstand the stress of heating. Brown or amber colored glass is used to keep contents protected from the ultraviolet and infrared spectrum of light and is available for glassware containers.

No matter what material laboratory glassware is made from, the names of the various glassware types remain consistent and are based on shape, volume, and intended use.

Flasks

Laboratory flasks are characterized by their shape, with a larger base and narrow open neck. Flasks serve a variety of purposes from collecting liquids to heating mixtures. They vary in size and shape, some having two necks. They are also produced in both plastic and glass.

Erlenmeyer flasks, also known as conical flasks, are the most common type of lab flask. First used by the German chemist Emil Erlenmeyer, they are flat bottomed and shaped like a cone with a single neck.

A Buchner flask is basically an Erlenmeyer flask with a small tube extending horizontally out of the neck. The side arm is specially made to tightly fit a flexible hose. These flasks are made of thick glass to withstand pressure changes as they are frequently used to create vacuums.

Volumetric flasks are precision flasks intended for accurate measuring of liquids. Metric measurements are marked on the flask. The flask has a pear or slightly bulbous shape with a long thin neck.

Florence, or round-bottom flasks are generally spherical with one or more long necks. There are some flat-bottomed Florence flasks that can sit without being supported. These are produced of borosilicate glass as they are used for boiling over a Bunsen burner and must be heat resistant.

A retort is designed for distillation. It has a spherical base and a very long thin tapering neck that points downward. Liquid is heated in the base, and the condensation then runs down the neck to a different container.

Beakers

Glass beakers are multi-purpose lab containers used for mixing and heating liquids. They have a cylindrical shape with a lip spout designed for pouring. Beakers are flat-bottomed and come in a variety of sizes, from one milliliter to large 10-liter plastic beakers. Although commonly made of borosilicate glass, plastic and stainless steel beakers are also produced. A beaker differs from a flask in their straight-sided shape. Most beakers are graduated, marked with metric units for measuring. They are used for a wide variety of purposes from mixing to heating.

Low form beakers differ from tall form beakers in the ratio of height to diameter. Low-form has approximately a 1.4 ratio while tall form is closer to 2. Flat beakers have a larger diameter than height and are used to evaporate liquids.

Bottles

Designed to contain liquids for storage, bottles come in a wide variety of materials, sizes, and shapes. Some are made with a flaring mouth to accommodate a glass stopper. Others have screw-on plastic caps. Bottles come in clear glass or amber glass for light sensitive liquids. They may be jar-shaped with a wide mouth, jug-shaped with a small thumb loop for secure holding, or have a square base.

Funnels

Funnels are inverted cones with a long straight neck. They are used for spill-free pouring from one container to another. They generally do not need to be heat resistant.

Burettes

Glass burettes are very long graduated tube shaped pieces of glassware used for accurate measuring of liquids. They are filled from the top and empty out of the bottom. A stopcock is located near the bottom to control the flow of liquids through the burette. They are manufactured for extreme accuracy and can be used to check measurements on other laboratory glassware. Burettes generally come with supports to hold them in place while measuring and release of liquids occurs.

Test Tubes

Test tubes are round-bottomed, cylindrical glassware widely used in laboratories to hold or mix small amounts of material. They can be stoppered with cork or rubber, and special racks are made to hold a group of test tubes. Test tubes are frequently used to culture organisms in biology, and special racks hold these almost horizontally for maximum culture medium surface.

Test tubes serve a wide variety of purposes from temporary storage in the lab to flower vases outside the lab. They are used by biologists, medical professionals, botanists, forensic technicians, and casually to contain everything from kitchen spices to beads.

About the Author

NovaTech International provides more information on Glass Beakers and other lab equipment.

Steel Flask Funnel $2.99 Use this Stainless steel Flask Funnel to fill any flask with your favorite beverage. A funnel makes filling much easier with no spilling and waist.

Flask & Funnel Set $29.99 This Stainless Steel 6 oz. hip flask comes complete with a stainless steel mini funnel to use to fill your flask without spilling valuable booze and making a mess. Comes in a gift box. Makes a great gift!

6oz. Flask Funnel Cups Gift Box (Flask Not Included) $17.99 A great gift idea, This is a 6 oz. flask gift box comes complete with a stainless steel mini funnel used to fill your flask without spilling valuable booze and making a mess as well as 4 mini shot cups. This gift box allows you to buy any the 6 oz. flask of your choice and present it as a gift with amazing asseccories. At such a low price add this to your flask order today!

6 oz. Acrylic Pocket Flask with Funnel $14.99 These wild transparent colored plastic flask are the best way to carry 6 oz. of "joy" in your pocket. These hip flasks will fit snugly against your leg, for maximum comfort, you wont even know it there! This flask will not feel bulky or heavy in your pocket and is made of high density durable polypropylene. this kit includes a convenient flask funnel so you wont spill a drop. You will not be disappointed.

Visol F2 Superspeed Stainless Steel Flask Funnel $19.31 The Superspeed allows for some of the easiest filling of flasks yet with its stainless steel body and smooth satin finish. It takes all the hassle and spills out of filling and makes the enjoyment of flasks all the more relaxing and easy. This funnel fits into all flask gift box sets.

Visol VSETA01 Pink 4oz flask and funnel Gift Set $33.93 A wonderful gift for any girl this Visol flask gift set will be highly appreciated by its recipient. A lovely pink leather will immediately cause her to fall in love with the flask. The premium quality stainless steel that it is made of provides strong and lasting flask. This easy to carry flask will go anywhere with four ounces of a beverage inside for you to enjoy whenever you please. Included in this gift set is a stainless steel funnel to help in filling the flask. You can have the oval plate on the flask engraved for a completely personal gift. Set Includes:. 4 Oz. Stainless Steel Flask with Genuine Pink Leather. Stainless Steel Funnel. Dimensions of Flask: 3.0 H x 3.8 W x 0..86 Thickness. 18/8 Grade Premium Quality Stainless Steel. Genuine Pink Leather. Engraving Offered.

Stainless Steel Pocket Flask $15.99 Stainless Steel Pocket Flask Constructed with stainless steel and comes with captive screw-on cap and handy funnel. Holds 9 oz.

HONEST Outdoor Stainless Steel Liquor Pocket Flask with Funnel(Silver/8 oz) $9.22 - Made of environmental friendly and non toxic material- Stainless steel designed with an attached screw cap- Swing arm attached to flask holds corrosion-proof screw-on cap- Includes safe plastic funnel- Linkproof and easy to carry with you

Deluxe 7 oz Stainless Steel Biker Flask $14.99 Deluxe 7 oz Stainless Steel Biker Flask . This hip flask is finished in beutiful stainless steel. In the center of the flask is a skeleton riding a motorcycle. Comes in a gift box. Makes a great gift! Mini Funnel NOT Included.

HONEST Outdoor Stainless Steel and Leather Curved Liquor Pocket Flask with Funnel(9oz) $10.31 - Stainless steel designed with an attached screw cap- Insulated with fine stitched faux leather- Swing arm attached to flask holds corrosion-proof screw-on cap- Includes safe plastic funnel- Linkproof and easy to carry with you

HONEST Outdoor Stainless Steel and Leather Curved Liquor Pocket Flask with Funnel(6oz) $9.26 - Stainless steel designed with an attached screw cap- Insulated with fine stitched faux leather- Swing arm attached to flask holds corrosion-proof screw-on cap- Includes safe plastic funnel- Linkproof and easy to carry with you

HONEST Outdoor Stainless Steel and Leather Curved Liquor Pocket Flask with Funnel(4oz) $7.46 - Stainless steel designed with an attached screw cap- Insulated with fine stitched faux leather- Swing arm attached to flask holds corrosion-proof screw-on cap- Includes safe plastic funnel- Linkproof and easy to carry with you

Endurance® Beverage Flask $21.95 Featuring a 18/8 stainless steel body, the Endurance® Beverage Flask holds 8 fluid ounces and includes a mini stainless steel funnel for easy filling. With contrasting polished top and attached lid, this flask has a gently curved design to fit snuggly in your breast pocket.Features: Brushed 18/8 stainless steel with polished top Includes a mini stainless steel funnel Curved design fits perfect in a breast pocket Size: Holds 8 oz.

Personalized Hip Flask $27.95 Personalized stainless-steel hip flask is an old favorite, dressed up in pink leather for a new generation. Includes a funnel and hinged screw cap. Oval plate is monogrammed with up to three engraved letters; please specify in order of appearance. Comes gift boxed. 3 3/4" x 5"; holds 6 oz.

Cheech & Chong Homegrown Flask $20.99 Inspired by the Cheech & Chong cult classic, Up In Smoke , this awesome 6-ounce black & silver stainless steel flask with vinyl wrap features the artwork of a very familiar plant. Includes steel funnel and attached screw on cap. Comes in a decorative gift box. (Subject to change.)

Rivers Edge 994 Stainless Steel Deer Flask $28.07 All stainless steel construction with great licensed art that wraps all the way around the flask. 9 ounce capacity and includes a handy stainless steel funnel for loading your beverage of choice. Makes a Great Gift. Contents:. River s Edge Stainless Steel Deer Flask. Stainless Steel Funnel.

Maxam 6Pc Flask Set with Live to Ride Emblem $22.62 Maxam 6 Piece Stainless Steel Flask Set. Set includes: 8oz flask with faux leather wrap and LIVE TO RIDE design funnel and 4pc 1oz stainless steel cups. All pieces feature brushed finish. Flask measures 35/8 x 53/4 x 1 .

Gsi 148344 Leather Flask 6 Oz Gift Set $43.13 Stainless Steel flask wrapped in leather. Stainless steel funnel included. Always providing you with the best selection and the best value.

Maxam KTFLSKGS 64oz Giant Shot Stainless Steel Flask Set $27.27 Includes 64oz flask 2pc 3oz cups and large funnel. Flask measures: 7 x 11 x 13/4 . Manufactured to the Highest Quality Available. Satisfaction Ensured. Great Gift Idea.

Maxam KTFLSET6 Maxam 6 Peicea Stainless Steel Flask Set $22.1 Set includes: 8oz flask funnel and 4pc 1oz cups. Brushed finish. Flask measures: 35/8 x 53/4 x 1 . Manufactured to the Highest Quality Available. Satisfaction Ensured.

Flask $19.99 Tim Pannell Flask - Photographic Print

Miami Dolphins 8-oz Stainless Steel Hip Flask $46.75 This Miami Dolphins 8-oz Stainless Steel Hip Flask includes a funnel for easy filling. Officially licensed flask also has team emblem on the front and a hinged screw cap for a tight seal.Color: Team logo, colors and emblem on frontIncludes a funnelStyle: Hip flaskMaterials: Stainless steelCapacity: 8 ouncesDimensions: 5 inches tall x 4 inches wide x 1 inch thickRecommended for adults over the age of 21

Philadelphia Eagles 8-oz Stainless Steel Hip Flask $41.56 This Philadelphia Eagles 8-oz Stainless Steel Hip Flask includes a funnel for easy filling. Officially licensed flask also has team emblem on the front and a hinged screw cap for a tight seal.Color: Team logo, colors and emblem on frontIncludes a funnelStyle: Hip flaskMaterials: Stainless steelCapacity: 8 ouncesDimensions: 5 inches tall x 4 inches wide x 1 inch thickRecommended for adults over the age of 21

Baltimore Ravens 8-oz Stainless Steel Hip Flask $46.34 This Baltimore Ravens 8-oz Stainless Steel Hip Flask includes a funnel for easy filling. Officially licensed flask also has team emblem on the front and a hinged screw cap for a tight seal.Color: Team logo, colors and emblem on frontIncludes a funnelStyle: Hip flaskMaterials: Stainless steelCapacity: 8 ouncesDimensions: 5 inches tall x 4 inches wide x 1 inch thickRecommended for adults over the age of 21

Cleveland Browns 8-oz Stainless Steel Hip Flask $39.48 This Cleveland Browns 8-oz Stainless Steel Hip Flask includes a funnel for easy filling. Officially licensed flask also has team emblem on the front and a hinged screw cap for a tight seal.Color: Team logo, colors and emblem on frontIncludes a funnelStyle: Hip flaskMaterials: Stainless steelCapacity: 8 ouncesDimensions: 5 inches tall x 4 inches wide x 1 inch thickRecommended for adults over the age of 21

Washington Redskins 8-oz Stainless Steel Hip Flask $44.05 This Washington Redskins 8-oz Stainless Steel Hip Flask includes a funnel for easy filling. Officially licensed flask also has team emblem on the front and a hinged screw cap for a tight seal.Color: Team logo, colors and emblem on frontIncludes a funnelStyle: Hip flaskMaterials: Stainless steelCapacity: 8 ouncesDimensions: 5 inches tall x 4 inches wide x 1 inch thickRecommended for adults over the age of 21

Georgia Bulldogs 8-oz Stainless Steel Hip Flask $40.52 This Georgia Bulldogs 8-oz Stainless Steel Hip Flask includes a funnel for easy filling. Officially licensed flask also has team emblem on the front and a hinged screw cap for a tight seal.Color: Team logo, colors and emblem on frontIncludes a funnelStyle: Hip flaskMaterials: Stainless steelCapacity: 8 ouncesDimensions: 5 inches tall x 4 inches wide x 1 inch thickRecommended for adults over the age of 21

Indianapolis Colts 8-oz Stainless Steel Hip Flask $40.52 This Indianapolis Colts 8-oz Stainless Steel Hip Flask includes a funnel for easy filling. Officially licensed flask also has team emblem on the front and a hinged screw cap for a tight seal.Color: Team logo, colors and emblem on frontIncludes a funnelStyle: Hip flaskMaterials: Stainless steelCapacity: 8 ouncesDimensions: 5 inches tall x 4 inches wide x 1 inch thickRecommended for adults over the age of 21

Oakland Raiders 8-oz Stainless Steel Hip Flask $43.63 This Oakland Raiders 8-oz Stainless Steel Hip Flask includes a funnel for easy filling. Officially licensed flask also has team emblem on the front and a hinged screw cap for a tight seal.Color: Team logo, colors and emblem on frontIncludes a funnelStyle: Hip flaskMaterials: Stainless steelCapacity: 8 ouncesDimensions: 5 inches tall x 4 inches wide x 1 inch thickRecommended for adults over the age of 21

Minnesota Vikings 8-oz Stainless Steel Hip Flask $45.72 This Minnesota Vikings 8-oz Stainless Steel Hip Flask includes a funnel for easy filling. Officially licensed flask also has team emblem on the front and a hinged screw cap for a tight seal.Color: Team logo, colors and emblem on frontIncludes a funnelStyle: Hip flaskMaterials: Stainless steelCapacity: 8 ouncesDimensions: 5 inches tall x 4 inches wide x 1 inch thickRecommended for adults over the age of 21

Tennessee Titans 8-oz Stainless Steel Hip Flask $40.52 This Tennessee Titans 8-oz Stainless Steel Hip Flask includes a funnel for easy filling. Officially licensed flask also has team emblem on the front and a hinged screw cap for a tight seal.Color: Team logo, colors and emblem on frontIncludes a funnelStyle: Hip flaskMaterials: Stainless steelCapacity: 8 ouncesDimensions: 5 inches tall x 4 inches wide x 1 inch thickRecommended for adults over the age of 21