Clear Plastic Bottle, Black Aluminium Cap, 50 ml

For smaller quantities of liquid cosmetics, a clear 50 ml PET pharmaceutical bottle with a black aluminium cap is enough, supplied as a ready-made set. The bottle is lightweight and unbreakable, so it suits samples, travel sizes and first test batches. Through the clear plastic you can see the contents and the liquid level, which is useful with oils, toners or coloured infusions. The cap with an 18/410 neck finish closes the neck without a dispensing element, so the contents are poured or dripped straight from the neck. The whole set is declared suitable for contact with cosmetics.

Suitable uses

• Face and body oils – the 50 ml size matches the usual size of a trial oil serum or massage oil.
• Toners and hydrolates – water-based products that are applied to a cotton pad or into the palm of the hand.
• Samples and travel sizes – the bottle weighs little and survives a fall, so in a bag or toiletry pouch it is safer than glass.
• Tinctures and alcohol-based products – with alcohol bases we recommend testing how the packaging behaves with your specific formulation, especially with a higher proportion of essential oils.
• Test batches – the small volume allows you to divide one batch into several bottles and monitor stability.

The bottle and cap as a whole

The pharmaceutical bottle has a narrow neck and a straight body, and the contents are dispensed in drops or a thin stream. The aluminium cap has an expanded polyethylene foam liner (EPE) inside, which sits on the rim of the neck and prevents leaking when the bottle is turned upside down. Moderate force is enough when tightening; excessive tightening only compresses the liner unnecessarily and does not improve the seal. The black metal closure on the clear bottle gives the packaging a uniform look without any further decoration.

Closures with the same neck type as stated in the parameters, as well as ready-made combinations, can be found in the Handymade range. If you combine a bottle and a closure yourself, we recommend checking the seal, the dispensing and the behaviour of the packaging with your specific formulation.

Nominal volume and filling

The stated 50 ml is the nominal volume, that is, the quantity the bottle is designed for under normal filling. The physical volume up to the neck is larger. The difference provides headroom for the cap and for the expansion of the contents when the temperature changes. The bottle is filled up to the nominal volume, never to the brim, otherwise the contents are pushed into the thread when closing and the seal stops working.

Good to know

Clear PET does not protect the contents from light. For oils prone to oxidation and for light-sensitive active ingredients, dark packaging is more suitable, or storage in the dark. The plastic tolerates common cosmetic bases. With concentrated essential oils, fragrance compositions and solvents, run a test in one bottle and check whether the wall turns cloudy or soft. The packaging should not be exposed to aggressive chemicals at all.

Only the bottle itself has a certificate for direct contact with food. The cap carries no such declaration, so the set as a whole is intended for cosmetics. After cleaning, you can reuse the bottle, but if the liner in the cap is markedly compressed or has absorbed a fragrance, it is better to replace it with a new closure. When sorting waste, separate the bottle and the cap: PET belongs with plastics and the aluminium cap with metals.

Frequently asked questions