Gloss Black Glass Bottle, Silver Aluminium Cap, 30 ml

This black glossy glass bottle with a capacity of 30 ml and a silver aluminium cap is designed for small volumes of cosmetics where protecting the contents from light matters. The opaque black glass does not let light through, so the bottle is filled with face serums, face and body oils, tinctures, perfume oils or concentrates of active ingredients that lose stability in light. The cap screws onto the 18/410 neck finish and closes the bottle for transport and everyday use.

The set is declared suitable for contact with cosmetic products. The medicine bottle shape, a cylindrical body with a short neck, stands stably and does not take up much space. It is therefore also suitable for retail displays, where several fragrances or serums stand side by side.

What it is suitable for

• Face serums and concentrates – water-based and oil-based serums with light-sensitive active ingredients, for example vitamin C or retinoids.
• Face and body oils – vegetable oils prone to oxidation; dark glass limits changes caused by light.
• Perfume and fragrance oils – glass does not react with fragrance components, and 30 ml is enough for a smaller batch or a gift pack.
• Tinctures and alcohol-based preparations – glass resists alcohol, and the closed bottle can be transported without worry.
• Test batches – the small volume lets you test a new recipe before making a larger quantity.

Volume and filling

The nominal volume of 30 ml is the volume the bottle is intended for in normal filling. The brimful capacity given in the parameters is the physical volume up to the top of the neck. The difference between the two is a margin for the cap and for expansion of the contents when the temperature changes. Fill to the nominal volume, not to the brim. An overfilled bottle overflows when the cap is screwed on, the contents get onto the thread and the seal becomes less tight.

Aluminium cap and dispensing

The silver cap is made of aluminium with an EPE seal made of polyethylene foam. The seal sits on the neck and seals the contents once tightened by hand, so no tools are needed. The cap has no dropper or pump, so the product is poured directly from the neck or taken from the bottle when filling smaller packaging. For more precise dispensing of serums and oils, closures with the same neck type are suitable; you will find them, together with ready-made combinations, in the Handymade range. If you build your own combination, we recommend checking the tightness, the dispensing and the behaviour of the packaging with your specific formulation.

Good to know

• Preparation before first filling – wash the bottle and the cap, disinfect them with isopropyl alcohol (IPA) or ethanol and let them dry completely.
• Temperature of the contents – let hot preparations cool before filling, as a sudden change of temperature can damage the glass.
• Essential oils – glass resists them. With a high proportion of essential oils, check on one test bottle how the cap seal behaves during longer contact with the contents.
• Opacity – the level of the contents cannot be seen in black glass; for test batches, a record of the date and the filled quantity helps.
• Reuse – after washing and disinfection, the glass can be used again. Check that the cap seal is not compressed or soaked with the previous fragrance.
• Recycling – both glass and aluminium are recyclable; separate the cap from the bottle before disposal.

Frequently asked questions