Laboratory Flasks
Laboratory flasks are essential glassware items used across a wide range of laboratory applications including chemical reactions, sample preparation, solution storage, heating, reflux, distillation, and filtration. The wide variety of flask types available — each with its own design characteristics and application strengths — means that flask selection is an important consideration for any laboratory seeking to optimise performance and safety across its routine workflows.
Varen Scientific supplies a comprehensive range of laboratory flasks to pharmaceutical, research, analytical, and academic laboratories across Ireland. Our laboratory flask range includes round bottom flasks, flat bottom flasks, Erlenmeyer (conical) flasks, and filtration flasks — available in standard borosilicate glass and heavy duty borosilicate 3.3 configurations across a wide range of capacities.
Round bottom flasks are designed for use on heating mantles, rotary evaporators, and vacuum systems — their curved base distributes heat evenly and provides structural strength under vacuum conditions. Flat bottom flasks offer greater stability on flat bench surfaces and are suited to general heating, mixing, and solution preparation applications. Erlenmeyer conical flasks are among the most versatile laboratory flasks, widely used for culture growth, titration, solution preparation, and general mixing across pharmaceutical, microbiological, and analytical laboratory workflows.
Filtration flasks are specifically designed for use with vacuum filtration assemblies, featuring a side-arm connector for attachment to a vacuum pump or water aspirator — making them an essential item for any laboratory performing routine Buchner funnel filtration.
Heavy duty borosilicate 3.3 flasks offer enhanced thermal and chemical resistance for applications involving repeated heating, aggressive reagents, or demanding laboratory conditions. All flasks are manufactured from high-quality borosilicate glass with white printing for clear, durable volume markings.
To request a quote or discuss your laboratory flask requirements, contact our team or use the Request a Quote button on any product page.
Showing all 6 results
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Laboratory FlasksErlenmeyer Flask Conical with NS Joint
Request a Quote →Glassco borosilicate 3.3 glass Erlenmeyer conical flasks with NS ground glass joint, compliant with ISO standards. Featuring white printing and the classic conical form suited to mixing, titration, culture growth, and general solution preparation, these flasks are a versatile and essential item in pharmaceutical, research, academic, and analytical laboratory environments. Available in capacities from 50mL to 2000mL with NS 14/23 and NS 29/32 joint options, supplied from the Glassco European warehouse in the Netherlands.
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Laboratory FlasksErlenmeyer Flask Narrow Mouth Heavy Duty Borosilicate 3.3
Request a Quote →Glassco heavy duty borosilicate 3.3 narrow mouth Erlenmeyer conical flasks, manufactured from premium borosilicate 3.3 glass for enhanced thermal resistance, chemical durability, and mechanical strength. Designed for demanding laboratory applications including repeated autoclaving, aggressive reagent use, and high-temperature heating where standard borosilicate glassware may not provide sufficient robustness. Available in capacities from 50mL to 2000mL, supplied from the Glassco European warehouse in the Netherlands for fast delivery across Ireland.
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Laboratory FlasksFiltration Flask with Glass Connector
Request a Quote →Glassco borosilicate 3.3 glass filtration flasks with glass side-arm connector, manufactured to ISO standards. The side-arm connector enables connection to a vacuum pump or water aspirator for Buchner funnel filtration, vacuum filtration, and other vacuum-assisted laboratory procedures. Available in capacities from 100mL to 2000mL with white printing, supplied from the Glassco European warehouse
in the Netherlands for fast delivery across Ireland. -
Laboratory FlasksFlat Bottom Flask with NS Joint
Request a Quote →Glassco borosilicate 3.3 glass flat bottom flasks with NS 29/32 ground glass joint, manufactured to DIN/ISO 4797 and USP standards. The flat base provides stable freestanding use on bench surfaces without a support stand, making these flasks suited to heating, general solution preparation, and reaction applications in pharmaceutical, research, and analytical laboratory environments. Available in capacities from 50mL to 2000mL, supplied from the Glassco European warehouse in the Netherlands.
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Laboratory FlasksNarrow Mouth Erlenmeyer Flask DIN Graduated
Request a Quote →Glassco borosilicate glass narrow mouth Erlenmeyer conical flasks with DIN graduation markings. The narrow mouth design reduces evaporation during mixing and incubation, and is compatible with
standard rubber and plastic stoppers for closed-system use. A versatile and economical general-purpose laboratory flask suited to titration, culture growth, solution preparation, and mixing in
pharmaceutical, research, academic, and analytical laboratory environments. Available in capacities from 25mL to 2000mL, supplied from the Glassco European warehouse in the Netherlands. -
Laboratory FlasksRound Bottom Flask Single Neck with NS Joint
Request a Quote →Glassco borosilicate 3.3 glass round bottom flasks with single neck and NS (Normalschliff) ground glass joint, manufactured to DIN/ISO 4797 and USP standards. Featuring white printing and uniform wall thickness, these round bottom flasks are designed for use with heating mantles, rotary evaporators, vacuum systems, and distillation assemblies in pharmaceutical, research, and analytical laboratory environments. Available in capacities from 25mL to 2000mL with multiple NS joint configurations, supplied from the Glassco European warehouse in the Netherlands.