With over 3000 containers and closures available, our range of premium lab bottles reflects the diverse needs of our customers. We strive to innovate to support life sciences advances, starting with the development of borosilicate glass nearly 100 years ago to our more recent glass lab bottle designs like YOUtility® and DURAN® TILT. Chemical bottles to reagent bottles, clear or amber glass, Type I, II, or III, borosilicate or soda-lime — the DWK Life Sciences portfolio contains all this and more, including plastics in a wide variety of shapes, sizes, colors, and properties.

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Standout Lab Staples

Because we think of media and lab bottles as the unsung heroes of most chemistry, life science, and industrial laboratories, we offer a wide variety of shapes, materials, sizes, and cap types to meet a range of needs. These multi-functional containers are suited for a vast range of scientific functions: media and reagent preparation, media sterilization, liquid handling and dispensing, filtration, shipping and transport, sample collection, sterile media storage, sample storage, frozen storage, long-term archival storage, tissue culturing, microbial culturing, heating and cooling samples, preparation of bulk intermediates, and shipping of APIs (active pharmaceutical ingredients).


The first borosilicate glass lab bottles evolved from serum bottles and were available with various Glass Packaging Institute (GPI) threads such as 33-430 and 38-430. In 1972, the wider mouth borosilicate 3.3 glass bottles with metric GL 45 glass threads were introduced in Germany. Our innovative history progressed alongside the evolution of the laboratory media bottles which saw the introduction of square lab bottles, pressure-resistant versions, and the truly wide-mouth GLS 80® bottles.


Today DWK Life Sciences offers a wide range of reusable glass bottles with commonly used thread finishes such as Glass Packaging Institute (GPI) and German DIN GL thread standards. The DURAN® ORIGINAL, WHEATON®, and KIMBLE® KIMAX® GL lab bottles are molded from high-purity, clear, USP / EP Type I borosilicate 3.3 glass, renowned for its excellent thermal qualities and superior resistance to chemical attack. A combination of high-performance materials, robust ISO 4796-1 design, and reusability provide a long working life. The bottles feature an easy-to-read graduated volume scale and marking field in permanent white enamel. For your convenience, a glass bead on the shoulder line indicates the nominal capacity line on 100mL through 2L sizes. The DURAN®, WHEATON®, and KIMBLE® KIMAX® bottles can be supplied as bottles only or, if you prefer, complete with the polypropylene linerless caps and drip-free pouring rings. The DURAN® Original GL 25/32/45 bottles feature a permanent Retrace
Code on each bottle for manufacturing lot traceability and certification.


Choose the materials option that best suits your application, including clear glass, protect / KimCote® plastic safety-coated glass, and amber / low actinic RAY-SORB® for light-sensitive applications. Many of the DURAN®, WHEATON®, and KIMBLE® GL lab bottles are available with a clear plastic safety coating (identifiable as protecting or KimCote®) to provide added fortification against impact or mechanical breakage. With the addition of a fused, external amber RAY-SORB® layer, light-sensitive contents are protected from the effects of photodegradation. Rest assured, the protection against ultra-violet light meets international USP / EP standards and lasts the lifetime of the bottle.


Our KIMBLE® KIMAX® lab bottles have 33-430, and 38-430 threads and are also molded from high-purity, clear, USP / EP Type I borosilicate glass 33, renowned for its excellent thermal performance, and high resistance to chemical attack.


The innovative square DURAN® lab bottles have a space-saving shape that offers the benefit of close and efficient packing — saving up to 20% more space than traditional round bottles. These bottles are ideal for the shipping and storage of high-demand materials or for reagent supply to instruments where bench space is at a premium. When working with larger samples or materials like granules, powders, or viscous liquids, we recommend the DURAN® wide mouth GLS 80® laboratory bottle which allows for easier access.


Be aware, standard glass lab bottles are not designed to safely withstand pressure differentials. The DURAN® pressure plus+ GL 45 bottles, however, offer a safer option for laboratory applications involving a vacuum or pressure. The bottom line? Whatever the application, DWK Life Sciences can provide a suitable laboratory bottle solution.

DWK Life Sciences offers a comprehensive product range of precision closure systems for laboratory bottles and jars, starting with high-quality standard screw caps and closures suitable for many scientific applications. Our portfolio also includes identification aids, special closures for sterilization processes, caps made of high-performance materials for demanding applications, drip-free pouring rings, connection systems, tamper-evident closures, and transportation accessories. We also offer caps and fluid transfer caps to fit the various glass, and plastic thread finishes that are commonly used for laboratory bottles, such as Glass Packaging Institute (GPI), Society of the Plastics Industry (S.P.I.), ISO and ASTM specifications, and European DIN GL 25/32/45 thread standards.

The broad selection of the KIMBLE® caps and closures category serves our products in
markets such as HPLC, GC, LC, NMR, as well as options for the medical and pharmaceutical environments. The perfect closures from WHEATON® complete your package. We provide a wide variety of caps, seals, and stoppers to ensure a perfect fit for your container. The WHEATON® portfolio offers closures suited for a wide range of applications.

Our selection of dedicated accessories work perfectly with the DURAN® laboratory bottles and are available to enable practical color-coding, product labeling, and identification. Screw caps and pouring rings are fully compatible with DIN GL bottle threads. Most are reusable and long-lasting, just like the DURAN® bottles. Screw caps that conform with USP Class VI requirements are ideal for demanding primary packaging applications in the pharmaceutical industry. The robust and durable DURAN® tubing connection systems allow the easy transfer of liquids in and out of bottles under controlled conditions, thus reducing the risk of contamination. Connector elements are also available for probes and stirrers. Sterile venting membrane caps are recommended when sterilizing microbiology media. These components improve the safety and ease-of-use of the laboratory bottles during autoclaving and protect the media from contamination.

Glass and plastic serum bottles are popular for their versatility and wide range of sizes and are suitable for containing most solid, liquid, or powder samples. Molded Type I borosilicate glass serum bottles are designed especially for handling and storing samples where the near inertness and resistance of the glass is essential. Glass serum bottles are well suited for the handling, containment, and storage of a variety of liquids including reagents, injectable drugs, vaccines, blood plasma, culture media, and chromatography samples. In addition, amber glass serum bottles are available that meet the requirements of USP <660> and EP 3.2.1 for protection against UV light for sensitive materials. Smaller WHEATON® glass serum bottles are excellent for the lyophilization (freeze-drying) of biopharma products and for vaccine / injectable primary packaging solutions in the IVD diagnostic and pharmaceutical market. They are equally well suited for short- or long-term sample storage. For your convenience, WHEATON® graduated serum bottles have raised graduations that indicate approximate capacities in milliliters. WHEATON® plastic serum bottles are a popular alternative to glass serum bottles as they are impact-resistant and lightweight. They are frequently used for the storage of non-medical products and animal health products, especially diluent solutions.

Serum bottles are available with a wide variety of neck finishes that accommodates serum bottle stoppers, standard laboratory rubber stoppers, a crimp top cap, or vial seals.

We offer a comprehensive portfolio of WHEATON®, KIMBLE®, and DWK Life Sciences general-purpose laboratory containers and closures from borosilicate and soda-lime glass as well as plastics. Containers are supplied with or without attached caps to suit your preference and, of course, we offer an assortment of compatible caps and liners to choose from. We’re happy to offer flexibility on quantities as well — from small cases of containers to large bulk packs. Customization to meet your specific needs is simpler than ever, including pre-cleaning, and barcoding.

We offer plastic containers for a variety of laboratory and scientific applications. There are many different types of polymers used in the creation of these containers to help fill the demands for the various applications. We understand that polymers offer a variety of properties, each having varying levels of importance with different users depending on the application. Laboratory users may need containers that are autoclavable, transparent, or pre-sterilized, for example, and thus require additional specifications. DWK Life Sciences can help with polymer selection through an understanding of the customer’s requirements.

General-purpose lab bottles in clear or amber glass are available in many shapes and sizes each with corresponding primary benefits. Cylindrical, round bottles such as Boston rounds are robust and durable. In contrast, French square/tablet bottles are easier to stack to maximize storage space. Like our other bottles, these are manufactured from either borosilicate USP Type I glass or soda-lime glass that conforms to USP Type III requirements. Amber glass helps protect UV light-sensitive samples even over long-term storage periods. Various neck finishes — from narrow to wide mouth — are offered to meet your needs. Narrow mouth bottles are ideal for liquids, whereas wide-mouth bottles are easier to fill and better suited for dry or viscous samples. Some general-purpose laboratory containers are available with graduations. For example, the Valumetric™ graduated bottles have both mL and ounces indicators. Where safety is paramount, we recommend you choose one of our glass lab bottles that are available with Plastisol safety coating.

Dropping bottles offer an alternative to pipetting devices, allowing for the repeated, consistent, and accurate dispensing of reagents one drop at a time or in a stream. There are two general types of dropping bottles available: squeezable plastic bottles with dropper control tip and glass bottles with a small removable, glass pipette fitted with a rubber teat.

WHEATON® dropping bottles have excellent chemical resistance making them the right choice for laboratory reagent dispensing, biotech, and diagnostic packaging applications. The extended controlled dropping tips dispense reliable, repeatable uniform drop sizes, one drop at a time. WHEATON® dropping bottles come in natural and white polyethylene, feature good chemical resistance, and are suitable for dispensing most acids, bases, and alcohols. The dropper control tip snaps securely into place, providing a leak-proof seal. By squeezing the flexible bottle, with the tip pointing downwards, single drops of the contained liquid can easily be dispensed. Plastic dropping bottles are available in different sizes so that you have the appropriate volume to hand for your application. Dropper closures in different colors are available for reagent identification.

Both borosilicate and soda-lime glass dropping bottles are chemically resistant and reusable. Amber glass droppers provide protection against UV rays, making them suitable for use with light-sensitive materials. KIMBLE® amber glass dropping bottles feature a polypropylene screw cap with a rubber bulb that is ideal for the storage and dispensing of light-sensitive chemicals. KIMBLE® dropping bottles are manufactured from clear or amber soda-lime glass. A partial turn of the ground glass stopper delivers indicator solutions drop by drop. Most dropper bottles are designed for general-purpose use, but some are suitable for specific standardized tests. For example, the KIMBLE® clear dropping bottles are designed specifically for determining the oil absorption of pigments (ASTM D281).

This chemistry and pharmaceutical lab staple can be molded from either borosilicate or soda-lime glass and is suitable for the storage of liquids, solid chemicals, and reagents. Borosilicate Type 1 glass reagent bottles are especially suitable for air-sensitive environmental sampling, pharmaceutical API storage, handling, and shipping. The narrow necks of the reagent and solutions bottles are designed for liquids, and the angle of the shoulders ensure that the contents can be smoothly poured. The wider neck versions are more convenient for handling granules or viscous liquids powders. Our ground glass stoppers provide an excellent seal, protecting the contents from evaporation, oxidation, and contamination. Traditional glass stoppered reagent bottles are suitable for autoclaving at 121 or 134 °C, or dry heat sterilization. Polyethylene, or PTFE, standard taper stoppers offer an alternative to glass stoppers.

Both the wide- and narrow-necked versions of the DURAN® ISO 4796-2 reagent bottles are available in clear or amber borosilicate 3.3 Type 1 glass. These bottles feature a printed Retrace Code for manufacturing lot traceability and certification and a marking field in permanent white enamel. The amber glass ensures that light-sensitive contents are protected from the effects of photo-degradation. The amber glass protection against ultra-violet light meets USP <660> and EP 3.2.1 standards and lasts the lifetime of the bottle.

KIMAX® solution bottles are supplied with a color-coded PTFE flathead stopper. The KIMAX® Solution narrow mouth lab bottles are available with KimCote® safety coating to reduce hazards of shattered glass, leakage, or loss of valuable or hazardous contents. DURAN® unground neck reagent and KIMAX® unground neck solution bottles can be ordered with the conical unground neck for use in microbiology with cotton plugs, rubber, sponge, cellulose, or foam stoppers.

Frequently Asked Questions

The capacity graduations on the bottles have tolerance of either ± 5% or ± 10%.
ISO 4796-1:2016 does not state any tolerance for the nominal capacity or graduations. Because the bottles are not certified or sold as “volumetric measurement devices,” the capacity indicators are for guidance only.

We’ve marked the full (working/nominal) capacity as a circular indent in the "shoulder ring" of the GL bottle. This arrangement is specified in the ISO standard 4796-1:2000 "Laboratory glassware -- Bottles -- Part 1: Screw-neck bottles"

Laboratory bottles are generally not suitable for use under pressure or vacuum. For
pressure or vacuum applications that require laboratory bottles, the DURAN® pressure plus+ bottle range is recommended.

Keep in mind, the plastic coating of laboratory bottles (DURAN® protect or KimCote®) has no influence on pressure resistance and safety coated products are not designed for use under pressure.

No. Only those bottles manufactured from polypropylene can be autoclaved.

The maximum permissible operating temperature for a borosilicate glass bottle is +500 °C (short time less than 10 hours). Above a temperature of +525 °C the glass begins to soften, and above a temperature of +860 °C it changes to the liquid state.

The starting point is a clear borosilicate 3.3 glass bottle. The bottles undergo a special
ion diffusion process that creates a chemical durable amber layer on the glass bottle.

The amber DURAN® meets the requirements of USP <671> and Eur. Ph. 3.2.1. for protection against UV light. KIMBLE® RAY-SORB® meets the requirements of USP <671> EP 3.2.1., and JP 7.01 Section 5 for protection against UV light.

None of the standard plastic or glass laboratory bottles have been designed or tested for use with a centrifuge. However, 200ml heavy-duty glass centrifuge bottles are available under the KIMAX® brand.

Glass is much more resistant to corrosion than most materials. Borosilicate glass 3.3
is highly resistant to water, acids, saline solutions, organic substances, and halogens such as chlorine, and bromine. Its resistance to alkali is relatively high. Only hydrofluoric acid concentrated phosphoric acid, and strong alkalis at high temperatures (+100 °C) cause appreciable surface removal of the glass (glass corrosion).

Both types of plastic-coated bottles can be autoclaved / steam-sterilized at 121 °C (20
minutes).

In addition, the DURAN® protect bottles can be autoclaved at 134 °C.

Dry heat resistance is 110 °C KimCote®, and 135 °C DURAN® protect. Keep in mind, that’s for short time exposure less than 30 minutes.

Recycling suitability depends on the type or chemical composition of the glass. Soda-lime bottles, for example, can be recycled at a standard facility.

However, borosilicate laboratory glass bottles (DURAN® / WHEATON® /KIMBLE® KIMAX®) should under no circumstances be disposed of in normal bottle banks, since the high melting point can create problems when mixed with other glass cullet (soda-lime glass) for recycling. The customer is responsible for correct disposal. This means disposal with general household waste (residual waste) in accordance with the relevant guidelines.

The market for borosilicate is relatively small, typically laboratory glassware, some
special lighting applications, and glass cookware. At the present time, it is not
economical to set up a dedicated recycling system just for this glass type.