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Product Spotlight - Bulb Glass Droppers

Product Spotlight - Bulb Glass Droppers


Bulb glass droppers are great dispensing caps when a more controlled application is needed. SKS has 5 styles of bulb glass droppers that may fit into your product line seamlessly.

Bulb Glass Dropper Materials

Each bulb glass dropper has three components, the pipette, the cap, and the bulb. The pipette is composed of type III glass and tapers at the end for a controlled drop. The ribbed caps are composed of polypropylene. Polypropylene is a type of plastic that is widely used in the construction of caps due to its high durability, good resistances to many compounds, and because it can be cleaned and sterilized in many different ways.

The bulbs consist of Monprene rubber. Many customers can be unsure about using a rubber material with their products; we want to make sure you are confident with our packaging. Monprene has a lower density, which means the bulb will have high flexibility, allowing for easy squeezing. Monprene is resistant to acids, bases, and solvents and has a smooth finish but is easy to grip. Regarding safety, Monprene is FDA compliant, BPA, latex, PVC, and Phthalate free. Our manufacturer completes rigorous testing with all Monprene, and the material and bulb glass droppers are produced in the USA. Every product is different, and SKS is excited to have customers from many different industries. Because of this we highly suggest testing your product with these bulb glass droppers to confirm compatibility.
Bulb Glass Dropper Materials

Bulb Glass Dropper Fitting

There are two requirements when pairing a bulb dropper with a container. The first compatibility requirement is the neck finish, each bulb glass dropper has a neck finish listed, this must match the neck finish of the bottle or vial it is being paired with. The second requirement is the length of the glass pipettes. The pipettes are measured by placing a ruler inside of the caps until it is flush with the gaskets and reading the measurement at the tip of the pipettes. The measurement of the bottles or vials need to run from the top of the neck down to a few millimeters above the base of the container. You do not want the pipettes to touch the bottom of the containers, a few millimeters distance from tip to base is highly suggested. When viewing the measurements, they will have two numbers similar to 5 mm x 46 mm. The first number is the diameter of the glass pipettes and the second number is the length of the glass pipettes.
Bulb Glass Dropper Fitting

Bulb Glass Dropper Selections

SKS has a large selection of bulb glass droppers. With these options, you can find sizes to pair with plastic bottles, glass bottles, and glass vials.

Available in black and white are bulb glass droppers with a simple yet durable construction and ribbed polypropylene screw-on caps. The white bulb glass droppers are offered in 3 different neck sizes. The white glass droppers could pair nicely with frosted glass bottles, blue glass bottles, or clear glass vials for spa and cosmetic applications. The black bulb glass droppers are available in seven different neck finishes with various glass pipette lengths to match a large number of plastic bottles, glass bottles, or glass vials. Black bulb glass droppers could pair with darker bottles and vials for flavorings, pharmaceuticals and lab applications.

For a tamper evident option, SKS has black bulb glass droppers with tamper evident rings in two sizes. With a neck finish of 18/415 these glass pipettes feature 7 mm x 62 mm or 7 mm x 82 mm sizes. These tamper evident closures are compatible with most Euro Dropper Bottles. This is due to the ring or lip that runs around the neck of a Euro Dropper Bottle. The lip is what holds the plastic ring from the cap in place when the rest of the cap is initially removed. A plastic ring around the neck of a container indicates that the container has been opened.
Bulb Glass Dropper Selections

SKS has black and white child resistant bulb glass droppers for an added level of security. The black child resistant bulb glass droppers are available in two neck finishes. In 18/400 the glass pipette length offered is 7 mm x 66 mm, and in 20/400 the length options are 7 mm x 76 mm or 7 mm x 89 mm. The white child resistant bulb glass droppers are available in two pipette lengths. Both options have a 20/400 neck finish, and you have the choice between 7 mm x 76 mm or 7 mm x 89 mm. To remove child resistant bulb glass droppers, press down and turn the caps in the direction of the arrow printed on the top. Child resistant bulb glass droppers could be a useful choice when packaging E-liquids, essential oils, chemical compounds and more.


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