Dropper Bulbs & Rubber Teats Manufacturer – Silicone Caps for Dropper Assemblies
The dropper bulb – also called a rubber teat or silicone dropper cap – is the part of a dropper assembly that the user squeezes to draw liquid into the pipette and release it drop by drop. Its wall thickness, hardness and recovery decide how much liquid is drawn up, how consistent each drop is, and how the dropper feels in the hand.
ARPL molds dropper bulbs and teats in platinum-cured silicone, natural rubber and NBR for pharmaceutical, healthcare and cosmetic dropper assemblies. Bulbs are made to fit standard collars and glass or plastic pipettes, or tooled to your own design.
Available Dropper Bulb & Teat Materials
About ARPL Dropper Bulbs & Rubber Teats
A dropper assembly is made of three parts: the rubber or silicone bulb, a plastic or metal collar that screws onto the bottle, and a glass or plastic pipette. ARPL manufactures the bulb (the silicone cap) and supplies it to dropper assembly makers, bottle manufacturers and pharmaceutical and cosmetic brands.
We mold bulbs for the most common neck finishes (13mm, 18mm, 20mm and 24mm collars) with bulb volumes from about 0.5ml to 5ml. The inner bead and neck are held to tight tolerances so the bulb grips the pipette and collar firmly without leaking or slipping. Wall thickness and hardness are tuned so the bulb draws the required fill volume and springs back quickly after every squeeze.
Silicone bulbs do not crack, go sticky or harden with age the way low-grade rubber teats do, and they withstand contact with essential oils, alcohol-based tinctures and serums. Bulbs can be supplied post-cured to reduce volatiles, and in clear, white, black, yellow, pink or Pantone-matched colours to suit your packaging.
From sampling to high-volume production, ARPL's in-house tooling, molding and inspection lets us match your existing bulb or develop a new one with consistent quality batch after batch.
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Frequently Asked Questions
Answers to common questions about dropper bulbs, rubber teats and silicone dropper caps
Yes. Dropper bulb, rubber teat, dropper teat and silicone dropper cap all describe the same squeezable part at the top of a dropper assembly. In Indian pharmaceutical packaging it is usually called a rubber teat; internationally and in cosmetics it is usually called a dropper bulb.
It is the soft bulb (also called a teat) at the top of a dropper assembly. Squeezing it pushes air out of the pipette; releasing it draws liquid in, which can then be dispensed drop by drop.
Silicone is odourless, inert and resistant to oils and alcohol. It does not crack, harden or go sticky over time like low-grade rubber, so it is preferred for pharmaceutical, cosmetic and essential-oil droppers.
They work the same way. A dropper bulb is fitted to a dropper assembly that screws onto a bottle, while a pipette bulb is fitted to a loose glass Pasteur pipette in a laboratory. ARPL makes both.
We make bulbs to fit standard 13mm, 18mm, 20mm and 24mm dropper collars with bulb volumes from about 0.5ml to 5ml, for bottles from 5ml to 100ml. Custom sizes can be tooled to your drawing or sample.
Yes. Send us a sample or drawing of your current bulb with the collar and pipette, and we will match the fit, hardness and draw volume, or suggest improvements.
Yes. Bulbs are available in clear, translucent, white and black, and can be colour-matched to your Pantone reference.
Platinum-cured silicone leaves no peroxide by-products, so it is cleaner, odourless and has lower extractables, which makes it the preferred choice for pharmaceutical and skincare products. Peroxide-cured silicone is a more economical option for general cosmetic droppers.