Green Glass Bottle, Black Tamper Evident Safety Cap & Dropper 10 ml

This green 10 ml glass bottle with a short dropper insert and a black tamper-evident cap is intended for small volumes of liquid cosmetics that are dispensed drop by drop. It is most often filled with essential oils and their blends, facial and nail oils, oil serums, perfume oils or tinctures. Glass does not react with the contents, and the green tint lets through less light than clear glass. All three parts of the set are declared suitable for contact with cosmetic products.

What the set contains and how to work with it

• 10 ml glass medicine bottle – green glass with an 18/410 neck finish. The bottle has straight walls and a narrow neck, so it sits well in the hand even at a small volume.
• Short plastic dropper insert – a PP dropper insert that is pressed into the neck after filling. When you tilt the bottle, the contents come out drop by drop rather than in a stream, and they do not spill all at once if the bottle is knocked over.
• Black tamper-evident cap – a smooth screw cap made of PP and PE. The tamper-evident ring separates the first time the cap is unscrewed, so both the customer and the manufacturer can see whether the packaging has already been opened. When you sell finished products, it serves as proof that the packaging has not been tampered with.

The set is filled without the dropper insert. After pouring in the contents, press the dropper insert into the neck and only then screw on the cap. The dropper insert fits tightly in the neck, so do not remove it during normal use. The bottle cannot be refilled through the dropper insert.

What the set is suited for

It works best with thin to medium-thick liquids. Essential oils, alcohol-based tinctures, perfume oils and light vegetable oils (jojoba, almond, grape seed) drip evenly and can be counted out drop by drop. Thicker oils, such as castor oil, flow slowly through the dropper insert, and even more slowly in a cold room. Creams, gels and thick serums are not suitable for a dropper insert; a jar or a bottle with a pump is a better choice for them.

A volume of 10 ml suits samples, travel packs, cuticle oils, eye-area serums or essential oil blends for aromatherapy, where only a few drops are used per day.

Nominal and total volume

The nominal volume of 10 ml is the volume the bottle is designed for in normal filling. The brimful capacity given in the parameters is the physical volume of the glass up to the top of the neck. The difference between them is a reserve for the dropper insert, which displaces some air and liquid when it is pressed in, and for the expansion of the contents when the temperature changes. Therefore, fill the bottle to the nominal volume. If you fill it to the brim, the contents will overflow when the dropper insert is pressed in and will soil the thread, which makes the cap seal worse.

Good to know

Before the first filling, wash the bottle, disinfect it with isopropyl alcohol or ethanol and let it dry completely with the neck facing down. Treat the dropper insert and the cap in the same way. Make sure no water remains on the plastic parts. Residual moisture in an oil-based product encourages the growth of microorganisms.

Glass withstands normal temperatures during filling, but a sudden change of temperature is not good for it. Do not pour hot liquid into a cold bottle and do not leave the bottle in freezing temperatures. The medicine bottle may break if it falls onto a hard floor, so when you transport larger quantities, pack them with dividers.

Reuse is possible for the glass part. Simply wash it and disinfect it again. The dropper insert has a narrow channel that cannot be cleaned thoroughly after oils and perfumes, so replace it when you refill. The cap can be used again, but once it has been opened its tamper-evident ring is no longer intact. For selling finished products, only a new cap will do.

The cap and the dropper insert both fit the 18/410 neck finish. You can find other closures with the same neck type, and ready-made packaging and closure combinations, in the Handymade range. If you make your own combination, we recommend checking the tightness, the dispensing and the behaviour of the packaging with your specific formulation.

After use, the glass and the plastic parts are sorted separately. Remove the dropper insert and the cap from the bottle before disposal, otherwise the package as a whole cannot be recycled properly.

Frequently asked questions