Clear Frosted Glass Bottle, Black Aluminium Cap, 50 ml

This is a ready-made packaging and closure set: a glass bottle made of milk (frosted) glass with a capacity of 50 ml and a black aluminium screw cap. The set is intended for filling liquid and semi-liquid cosmetic products dispensed by pouring or applying from the bottle. It is particularly suitable for facial and body oils, oil-based serums, tonics, hydrolats, tinctures and fragrance compositions in smaller packaging. Frosted glass has a uniform, clean appearance and transmits light only partially. The set is declared as suitable for contact with cosmetic products.

Why choose this combination

• Glass is inert – it does not react with aqueous, alcoholic or oil-based contents and does not absorb fragrances, making it suitable for essential oils, fragrance compositions and alcohol-containing tinctures.
• Frosted surface – the glass is semi-transparent, the contents are visible as an outline and fill level, while details are concealed. The product thus appears cohesive even without dark glass.
• Aluminium cap with sealing insert – the metal shell holds its shape and the insert seats on the rim of the neck, sealing the bottle. The black colour on frosted glass creates a contrast that suits minimalist labels.
• Small volume – 50 ml is a practical size for concentrated products dispensed by drops or in small amounts, for samples and trial batches before moving to larger packaging.

Nominal and total volume

The nominal volume is the quantity the bottle is designed for during standard filling. The total brim-full volume is the physical volume up to the neck and is slightly larger. The difference between them is the headspace for the closure, any dropper or pump, and for the expansion of the contents when the temperature changes. The bottle should therefore be filled to the nominal volume, not to the brim – otherwise the contents will be forced onto the thread when closing and the cap will not seal.

Using the set in practice

The bottle with a solid cap is used where the contents are poured directly onto the palm, a cotton pad or into another container. For more precise dispensing of serums and oils, a dropper or pump with the same neck type is more suitable than the cap; closures with this neck and ready-made combinations are available in the Handymade range. With your own combination, we recommend verifying the seal, dispensing and the behaviour of the packaging with the specific formulation.

The cap is tightened by hand until the insert seats on the neck. Aluminium is a softer metal than steel, so over-tightening can deform the cap shell and the seal will deteriorate.

Good to know

• Glass and temperature – glass tolerates heat but not a sudden change in temperature. Allow the hot phase to cool to at least lukewarm before filling, or preheat the bottle, otherwise there is a risk of cracking.
• Alcoholic and fragrant contents – with tinctures, alcoholic tonics and pure essential oils, it is worth checking in the first few days after filling whether the cap insert holds and the contents are not leaking onto the thread.
• Reuse – the glass bottle can be reused after thorough washing and disinfection. If the cap insert is compressed or the shell is deformed, replace the closure.
• Labelling – the frosted glass surface is uniform and labels adhere well to it.
• Recycling – the bottle belongs in glass recycling, the aluminium cap in metals. Separate them before sorting.

Frequently asked questions