Blue Glass Bottle, Silver Aluminium Cap, 15 ml

This blue glass bottle with an aluminium cap is used for storing and carrying small amounts of liquid preparations: essential oil blends, facial and nail oils, serums, tinctures or samples of your own formulations that you want someone to try. A nominal volume of 15 ml is used up before the contents have time to age, which is why this size is often chosen for more expensive ingredients and concentrated preparations.

Blue glass filters light and helps protect light-sensitive ingredients, such as essential oils, oils with a higher proportion of unsaturated fatty acids or plant extracts. Glass also does not react with alcohol or with concentrated essential oils. The neck is closed with a silver aluminium cap with an EPE (expanded polyethylene foam) seal. The seal sits on the rim of the neck and prevents leaks when the bottle is carried in a bag or sent by post.

Suitable uses

• Essential oil blends – dark glass and a small volume suit concentrated fragrance and aromatherapy blends that are later diluted in a carrier oil or added drop by drop to a diffuser.
• Facial and nail oils – fifteen millilitres lasts for several weeks of use, so the contents are used up while still fresh.
• Tinctures and alcohol-based extracts – alcohol does not affect the glass, and a tightly closed cap limits evaporation.
• Samples and test batches – when you are fine-tuning a formulation or sending customers a sample of a serum or oil, a small bottle is enough and can be labelled with the batch number and production date.
• Travel size – pour out your favourite oil or serum for a few days and leave the full bottle at home.

Nominal and total volume

Nominal volume is the amount the bottle is designed to hold under normal filling. Total brimful volume is the physical volume right up to the neck, and you will find it in the specifications. The difference between them is the headspace left for the cap seal or another closure and for expansion of the contents when the temperature changes. Fill to the nominal volume. The space above it stays empty so that the seal sits on a clean neck and the contents are not forced out when the bottle is closed.

Cap and dispensing

The aluminium cap closes the bottle; it does not dispense the contents. The liquid is poured directly through the narrow neck, which releases it in small amounts when the bottle is tilted carefully. Tighten the cap by hand until the seal sits on the neck. Aluminium is a soft metal, and if the cap is tightened with a tool or with great force, the cap thread can become deformed and will then no longer close evenly.

Closures with the same neck type, listed in the specifications, and ready-made combinations of the bottle with a dropper or fine mist sprayer are available in the Handymade range. If you create your own combination, we recommend checking the tightness, dispensing and behaviour of the packaging with your specific formulation.

Good to know

Before filling for the first time, wash the bottle, rinse it with isopropyl alcohol or ethanol and let it dry completely neck down. It is enough to wipe the cap inside and out with ethanol and let it dry as well. Residual water in the glass or in the seal would introduce moisture into an anhydrous oil or tincture.

The bottle is suitable for repeated use. After washing and disinfecting, it can be refilled; oil residues are removed with warm water and washing-up liquid followed by thorough drying. Check the cap seal before reuse. If it retains the fragrance of the previous contents, is stuck or compressed, replace the cap, otherwise it may not seal properly.

The declaration of suitability for contact with cosmetic products applies to the aluminium cap; the documentation is available with the product.

Glass and aluminium are sorted as separate materials, so unscrew the cap before disposal and sort it separately from the bottle.

Frequently asked questions