Dropper Assemblies with Rubber Bulb

A dropper assembly turns a bottle into a drop-by-drop dispensing system. Squeezing the bulb draws liquid up the glass pipette; releasing pressure lets it out again in controlled drops. The screw collar holds the assembly on the bottle, and its liner seals the bore between uses.

Pipettes can be plain or graduated with printed marks for measured dispensing, and collars come in standard and child-resistant versions, so one basic assembly serves cosmetics, supplements and over-the-counter products.

We supply dropper assemblies for facial serums and oils, essential oils and aromatherapy blends, tinctures and herbal extracts, CBD oils, homeopathic and OTC drops, flavor drops and pet or veterinary products. Most brands buy them together with amber, flint or frosted dropper bottles from our range, so the bottle neck, collar and pipette length arrive as one matched set rather than parts sourced from different suppliers.

Each assembly combines a drawn glass pipette (plain, graduated, bent or ball-tip, typically 55–100 mm long), a nitrile or silicone bulb, and a PP or aluminum-shell collar with a sealing liner. Collars fit standard dropper necks from 13 mm to 22 mm, including the 18 mm Euro neck. Child-resistant push-down-and-turn collars are available — ask us for the test certificate for your chosen model. Bulb color and collar finish are part of the pack’s look.

Match pipette length to the bottle so the tip reaches close to the base without touching it, and leave enough headspace for the pipette to displace liquid without overflowing. Bulb material matters: citrus and other essential oils swell some rubbers, so silicone bulbs are the usual choice for them. Fill, insert the dropper and tighten the collar so the liner seals against evaporation and leaks in transit.

Pipettes are drawn, cut and fire-polished, with graduations printed when required; bulbs are molded from nitrile or silicone; collars are molded and lined, and the parts are assembled. Pipette length, tip consistency and collar seal are our key quality checks. We supply droppers fully assembled or as separate components, with custom collar colors and finishes, colored bulbs and pipettes cut to your bottle height.