Clear Frosted Glass Bottle, Black Tamper Evident Safety Cap & Dropper, 50 ml

A ready-made kit for products dispensed drop by drop: a glass bottle with a nominal volume of 50 ml, a plastic dropper inserted into the neck, and a black cap with a safety lock. Milky translucent glass reduces direct light, thereby minimising its effect on facial oils, serums with active ingredients, essential oil blends in a carrier oil, or alcoholic tinctures. The contents remain visible in outline when held up to the light, so you can see how much is left.

The kit is declared as suitable for contact with cosmetics; the declaration of conformity is available with the product. The bottle, dropper and cap are supplied as a single item, so there is no need to search for a closure with the same neck size.

How the kit works

• Dropper – a plastic insert in the bottle neck that releases the contents one drop at a time when tilted. Suitable for thin contents: oils, oil serums, alcoholic solutions and aqueous solutions without a thickener.
• Cap with safety lock – a smooth black screw closure with an 18/410 thread that seals the bottle above the dropper.
• Milky glass – does not react with oils or alcohol and can be repeatedly washed and disinfected.

What it is suitable for

The most common use is for facial and hair oils, oil serums and facial massage blends, where a precise few drops need to be measured out. It works equally well for alcoholic tinctures, herbal macerates in oil, and fragrance concentrates in a carrier oil added to a bath.

The kit is not suitable for thick serums with a gel texture, emulsions or creams. The dropper has a small opening, and thick contents either do not flow through it or are dispensed unevenly. For such preparations, choose a bottle with a pump or a jar.

Nominal volume and volume to the brim

The nominal volume is the quantity the bottle is designed for during normal filling. The total volume to the brim is the physical volume up to the neck and can be found in the product specifications. The difference creates a reserve for the dropper, which occupies some space when inserted into the neck, and for slight expansion of the contents when the temperature changes. Therefore, fill to the nominal volume, not to the brim. If overfilled, some of the contents will be forced out around the dropper when the cap is closed, leaving the outside of the bottle sticky.

What is good to know

Before first filling, wash the bottle, disinfect it with isopropyl alcohol or ethanol and allow it to dry completely. Moisture in the bottle shortens the stability of anhydrous preparations and causes cloudiness in oils. The dropper and cap only need to be rinsed with alcohol and left to dry.

Glass tolerates washing in hot water, but not sudden temperature changes. Do not fill a cold bottle with hot contents – let them cool to at least room temperature first.

The dropper and cap are made of plastic. For undiluted essential oils and contents with a higher proportion of solvents, we recommend testing the behaviour of the plastic parts with the specific formulation, especially if the preparation is to remain in the bottle for a longer time. Blends diluted in a carrier oil can be dispensed without any issues.

The bottle can be used repeatedly. After emptying, wash it with warm water and detergent, rinse thoroughly and disinfect in the same way as before the first filling. The dropper may loosen in the neck after repeated removal – replace it in that case. Glass goes into glass recycling; the dropper and cap should be separated and sorted as plastic.

Frequently asked questions