At-Mar Glass manufactures precision-crafted glass funnels designed for professionals who demand reliability and performance in high-stakes laboratory environments. From fluid transfers to complex filtration processes, each glass funnel is expertly made in-house by skilled glassblowers using premium materials and advanced forming techniques.
Trusted by research universities, pharmaceutical labs, and chemical manufacturers alike, our funnels are built to deliver consistent results — with the quality, responsiveness, and service that set At-Mar apart.
Glass funnels are foundational components in lab workflows where consistency, material integrity, and dimensional accuracy are essential. At-Mar Glass designs lab funnels to integrate seamlessly with the processes that experienced professionals carry out daily — from solvent handling to phase separation.
In filtration, the geometry of the funnel affects both flow rate and retention. A stable taper, appropriate stem length, and chemically resistant material are critical for repeatable outcomes. Our glass funnel chemistry models are used across labs for gravity and vacuum filtration where compatibility with reactive substances and thermal cycling is a requirement.
During liquid transfers — especially involving immiscible solvents or reactive media — the structure and stability of the funnel can impact both safety and yield. A properly sized chemistry glass funnel helps manage flow while maintaining control at interfaces. For phase separation tasks, stem length and diameter options provide flexibility depending on the vessel or stand setup.
Funnel performance often comes down to consistency — in dimensions, joints, and wall thickness. Every funnel lab glass product is made with repeat use in mind. We focus on producing lab glass funnels that maintain structural integrity, even with thermal variation and regular cleaning cycles, making them suitable for both routine prep and specialized experimental protocols.
In laboratory glassware, material selection directly affects safety, performance, and longevity. This is especially true for funnels used in workflows involving high temperatures, strong solvents, or repetitive thermal cycling. For these reasons, borosilicate glass — including proprietary forms like Pyrex — is the standard across professional labs. The funnels we produce are formed from materials selected for their chemical durability, low thermal expansion, and mechanical stability.
A borosilicate glass funnel offers a low coefficient of thermal expansion, which means it can be heated and cooled without cracking — a key feature in filtration or transfer procedures involving temperature shifts. Borosilicate is also highly resistant to acids, bases, and solvents, making it well suited for a broad range of chemical applications. These properties help ensure a long service life, even with routine exposure to cleaning agents or high-temp sterilization protocols.
Although often used interchangeably, Pyrex refers to a branded type of borosilicate glass with specific manufacturing controls. A Pyrex glass funnel brings the same chemical resistance and thermal reliability, but is especially known for uniformity and consistent quality. For labs requiring standardization across equipment or those operating under GLP or GMP conditions, this consistency can reduce variability in experimental setups.
While both Pyrex and general borosilicate serve similar functions, your workflow may favor one over the other. For high-throughput settings or tightly regulated environments, the traceability and certification that often accompany Pyrex may be essential. In contrast, for custom assemblies, pilot-scale projects, or short-run experimental setups, standard borosilicate funnels often provide the required performance with added flexibility in form factor and cost.
Funnel design isn’t one-size-fits-all — especially in professional labs where equipment must match the specific demands of a procedure. From the length of the stem to the diameter of the mouth, each design choice plays a role in compatibility, flow rate, and control. Understanding the range of available configurations can help ensure optimal integration with existing setups and minimize disruption in your workflows.
Stem length impacts how fluid is directed and how much control you have during transfer. A glass funnel short stem is often ideal for rapid gravity-fed transfers into wide-mouth vessels or for workflows where minimizing path resistance is key. Longer stems, by contrast, provide better guidance into narrow vessels and reduce splash, especially during more delicate liquid additions or vacuum filtration setups.
Diameter affects both throughput and surface area. A large glass funnel allows for faster filtration and higher volume transfers — particularly useful when working with slurries or viscous materials. Smaller diameters are suited for fine control or limited bench space, such as when working under fume hoods or in scaled-down analytical setups.
In addition to stem and size, the overall funnel profile — steep vs. shallow angles, wide vs. narrow necks — affects flow behavior and fit within other glassware. Choosing the right shape can reduce turbulence, improve retention of solids, or enable better compatibility with filter media.
For example, an anti-turbulence funnel helps minimize splashing and air disruption during transfers, while a powder funnel is designed with a wide bore to facilitate safe, spill-free handling of dry materials. For labs running diverse protocols, having multiple funnel geometries on hand can add flexibility and efficiency.
In addition to standard glass funnels used for general transfer and filtration, At-Mar Glass also fabricates several specialized types for more advanced applications:
Ideal for controlled reagent introduction, our addition funnels include equalizing arms and optional PTFE stopcocks. They’re designed for precision, especially in exothermic or time-sensitive reactions.
Used extensively in liquid-liquid extractions, our separatory funnels are crafted from borosilicate glass and available in various volumes and joint configurations.
For high-performance vacuum filtration, fritted funnels offer superior retention without filter paper. These are especially useful in organic synthesis and materials testing.
Whether you’re sourcing funnels for a research lab, pharmaceutical operation, or academic setting, it’s important to choose the right tool for the job. Below are answers to common questions professionals ask when selecting, using, or maintaining glass funnels in scientific environments.
Glass funnels are used to direct liquids or fine-grained substances into containers with narrow openings. In scientific workflows, they are essential for filtration, solvent transfer, recrystallization setups, and other procedures requiring controlled flow and precision handling.
Short stem funnels are ideal for quick transfers into wide-mouth containers, while long stem funnels offer more control when directing liquids into narrow-necked vessels. The choice depends on the type of transfer, vessel compatibility, and desired flow rate.
Yes — many lab professionals use funnels for filtration, particularly when paired with filter paper or glass frits. For chemical compatibility, be sure the funnel is made from borosilicate or Pyrex glass, both of which resist thermal shock and corrosive substances.
Size depends on the volume you’re transferring and the physical constraints of your setup. A large glass funnel is useful for batch transfers or viscous materials, while smaller sizes offer greater control for precision work.
Standard glass funnels are designed for general liquid transfer. Powder funnels feature a wider bore to handle dry materials without clogging, while anti-turbulence funnels have design features that reduce splashing and air disturbance during pouring.
Yes — if you have specific requirements, we can produce custom funnels to match your apparatus, workflow, or compliance standards. This includes alterations in stem length, diameter, joint size, and material composition.
You can buy glass funnel options directly from At-Mar Glass. All funnels are manufactured in-house with close attention to material quality and dimensional precision. Whether you’re ordering a standard model or a custom solution, we’ll work with you to ensure a proper fit for your lab.
In laboratory environments where workflows are complex and timelines are tight, the reliability of your glassware supplier matters. At-Mar Glass supports scientists, chemists, and lab managers by providing glass funnels that are not only well-made but also adapted to the specific needs of the people who use them. From standard components to special glass apparatuses, our work is informed by decades of technical experience and direct collaboration with working labs.
Every funnel is fabricated entirely in-house at our Kennett Square facility, allowing full control over production variables — from raw material selection to flame-finishing and annealing. This level of oversight ensures consistency across batches and allows for tight tolerances in diameter, wall thickness, and stem length. As a glass funnel manufacturer, we’re able to deliver laboratory-grade precision, whether for one-off items or scaled production.
Not all experiments conform to standard setups, and we regularly design funnels to meet unique requirements — whether it's an unusually short stem, an oversized bore, or modifications to accommodate specialized apparatus. This adaptability has made us a preferred glass funnel supplier for labs that need more than off-the-shelf parts. We work closely with customers to translate functional needs into finished glassware that fits.
Glassware is a critical part of daily lab operations, and when something breaks or a setup changes, delays aren’t an option. Our short lead times and quick turnaround on repairs or replacements help minimize disruption. Whether you’re managing a high-throughput environment or coordinating with multiple departments, having a responsive partner means you can keep experiments on schedule — without compromising quality.
Whether you’re looking to source standard lab funnels or require a custom design for a specialized setup, our team is ready to assist. At-Mar Glass offers personalized support, technical insight, and responsive service tailored to the needs of working labs. Call us directly or submit a request online — we’re here to help you get exactly what your workflow demands.
