Glass Dropper, Silver Black, 56 mm

The black-silver dropper with 18/410 thread is a closure with a glass tube for bottles and vials with the same type of neck. It allows drawing up the contents and dispensing them drop by drop, which is why it is used for products where a small and repeatable amount matters – facial serums, facial oils, oil blends, tinctures, and concentrates of active ingredients.

The combination of black and silver looks neutral and pairs well with brown, blue, matte, and clear glass, making it suitable for a uniform product series regardless of the bottle colour. The closure is suitable for use with cosmetic products; a declaration of conformity is provided with the product.

How the dropper is assembled and how it works

The head consists of an aluminium shell with plastic parts and an internal thread made of polypropylene, with which the closure is screwed onto the bottle neck. Squeezing the silicone bulb creates a vacuum, the contents are drawn into the glass tube, and squeezing it again releases them drop by drop. The glass tube is important for products containing oils and essential oils, as glass, unlike soft plastics, does not absorb fragrances or pigments.

The silicone bulb is resistant to vegetable oils and common cosmetic ingredients. For contents with a high proportion of essential oils, alcohol, or solvents, we recommend checking its behaviour in the specific formulation – monitor whether it changes in elasticity or shape after a few weeks.

Suitable for contents such as

• Facial serums and concentrates – both water-based and oil-based serums with low viscosity, where a few drops are dispensed per application.
• Facial and body oils, oil blends – precise amounts without spilling.
• Tinctures, alcohol and glycerin extracts – drop dispensing is practical and hygienic with concentrated extracts.
• Essential oil blends and perfume concentrates – the glass tube does not absorb fragrance; we recommend checking the bulb's suitability at high concentrations.
• Oil extracts and carrier oils for hair and beard – dispensing directly into the palm or onto the scalp.

The dropper is not suitable for thick gels, creams, or suspensions with undissolved particles – thick contents cannot be drawn into the tube or do not flow out in drops. For such products, a pump or jar is more appropriate.

Bottle selection and filling

The dropper fits any bottle or vial with an 18/410 thread; bottles with this neck and ready-made packaging-closure combinations are available from Handymade. With a custom combination, we recommend verifying the seal, dosing, and closure behaviour with the specific formulation.

The figure 56 mm indicates the length of the glass tube. A correctly chosen tube ends just above the bottom of the bottle – this allows drawing up almost all of the contents. A tube that is too short leaves part of the contents inaccessible; one that is too long will not fit in the bottle or may press against the bottom when tightened and get damaged.

The bottle is filled to the nominal volume, not to the brim. The nominal volume is the quantity for which the packaging is designed under standard filling conditions; the total volume up to the neck is greater, and the difference provides a reserve for the dropper tube and for expansion of the contents when the temperature changes. If the bottle is filled to the brim, the contents will overflow through the neck after screwing on the dropper.

What's good to know

Preparation before first filling. The dropper is supplied in technical cleanliness, not sterile. Before use, we recommend washing the head and tube, disinfecting with isopropyl alcohol or ethanol and allowing to dry completely. Moisture trapped in the tube would enter the contents, which is particularly problematic for anhydrous oil-based products.

Hygiene with water-based products. The dropper returns to the contents with each use, introducing microorganisms from the environment and from the skin into the bottle. For water-based serums and tonics, effective preservation and verification of its efficacy are therefore essential; anhydrous oils are less sensitive, but even with them the dropper must be kept clean.

Repeated use. After thorough washing and disinfection, the dropper can be used again. When changing the contents, first rinse the tube with warm water and detergent, then with alcohol, to remove residues of the previous oil or fragrance. Before reuse, inspect the bulb – if it has lost its elasticity or does not seal when squeezed, suction will be weak.

Mechanical stress and moisture. The glass tube is fragile; tighten the dropper gently and do not allow the tube to press against the bottom. Do not expose the aluminium shell to prolonged moisture or aggressive cleaning agents that could damage the surface finish.

Recycling. This is a multi-component closure made of aluminium, plastic, glass, and silicone. Before disposal, separate the glass tube and bulb from the head and sort the parts by material.

Frequently asked questions