Clear Glass Bottle, Thick Bottom, Black Cap, 10 ml

A glass pharmaceutical bottle with a nominal volume of 10 ml and a plain black cap is intended for filling liquid cosmetic products in sample quantities, for travel or for a small batch. Clear glass lets you see the contents, so the colour of the oil or serum remains part of the presentation, and the thick base keeps the narrow little bottle standing stably on a table. The cap fits the 18/410 neck finish and closes the bottle without a dispensing element, so the contents are poured or dripped directly from the neck.

The set is declared as suitable for contact with cosmetic products; you will find the declaration of conformity on the product page.

What it is suitable for

The narrow neck and small volume make the bottle suitable for thin to medium-thick liquids. Thick creams and butters are difficult to get out of it; those belong in a jar.

• Face and hair oils – a recipe sample or a travel pack; the contents are dispensed by tilting the bottle into your palm.
• Perfume oils and diluted essential oil blends – a small quantity in a carrier oil, where the clear glass shows the shade of the blend.
• Serum and toner samples – for testing a recipe before making a larger quantity, or for customers before they buy a full-size pack.
• Tinctures and infusions for cosmetic use – alcohol-based and water-based preparations that are later added to a recipe in small doses.

How the set works

The cap is made of polypropylene (PP) and has a liner made of expanded polyethylene foam (EPE), which sits against the rim of the neck once the cap is tightened. It is closed by hand, without tools. Tightness depends on how firmly the cap is tightened and on whether any residue of the contents has been left on the thread or on the neck, so it is worth wiping the neck before closing.

A plain cap does not dispense. For products that are applied drop by drop or need to be dispensed precisely, choose a dropper instead. You will find closures with the same 18/410 neck type and ready-made combinations in the Handymade range. If you make your own combination, we recommend checking the tightness, dispensing and behaviour of the packaging with your specific formulation.

Filling and volume

The nominal volume is the volume the bottle is designed for in normal filling. The brimful volume is the physical volume up to the neck and is given in the parameters. The difference between them forms a reserve for the cap with its liner and for the expansion of the contents when the temperature changes. Fill to the nominal volume, not to the brim. The clear glass helps here, as the fill level is visible from outside.

Liquid gets into a narrow neck most easily with a small funnel or a syringe without a needle. With oils of higher viscosity, watch out for air bubbles at the bottom.

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. Residual water in the neck gets into an anhydrous product.
• Glass and temperature – do not pour hot contents into cold glass; let them cool to at least lukewarm. A sudden temperature difference can crack the glass.
• Cap and concentrated substances – with undiluted essential oils and solvents, we recommend checking the behaviour of the liner over time, in particular whether it softens or becomes deformed.
• Reuse – the glass can be washed and refilled repeatedly. Replace the cap if the liner is compressed, cracked or soaked with the previous contents.
• Food – the set is not declared for contact with food; use it for cosmetic products.
• Recycling – the glass and the plastic cap are sorted separately, each into its own waste stream.

Frequently asked questions