Clear Plastic Bottle, Black Cap, 50 ml

This plastic medicine bottle with a black screw cap is a ready-made set of packaging and closure for liquid cosmetic preparations with a volume of 50 ml. The clear PET shows the colour and the level of the contents, so it suits toners, hydrosols, facial oils, lighter serums, liquid soap or samples for customers. The bottle is light and does not shatter when dropped, so it withstands travel and everyday handling in the workshop.

The set as a whole is declared suitable for contact with cosmetics. Only the bottle has a certificate for direct food contact; the cap does not, so the set is intended for cosmetic use.

How the set works

The cap with an 18/410 neck finish has a foamed polyethylene liner inside, which sits against the neck and seals the contents against leakage. The closure is tightened by hand, without tools. The narrow neck releases the contents slowly, so you can dispense them even without a separate dispensing element. Thicker emulsions and creams are awkward to pour from a medicine bottle; a jar or a bottle with a wider neck suits them better.

You can find closures with the same neck type and other ready-made combinations in the Handymade range. If you choose a different closure for this bottle, check the seal, the dispensing and the behaviour of the packaging with your specific formulation.

What it is suitable for

• Water-based preparations – toners, hydrosols, facial and cleansing waters that are poured onto a cotton pad or into the palm.
• Oil-based preparations – body and facial oils, oil serums, massage oils in a smaller pack.
• Liquid soap and cleansing gels – as a travel or trial size.
• Samples and test batches – the clear wall shows cloudiness, sediment or a change of colour during stability tests.

Filling and volume

The nominal volume is the volume the bottle is designed for under normal filling. The total brimful volume is larger and reaches up to the neck. The difference between them forms a reserve for the closure and for the expansion of the contents when the temperature changes. The bottle should therefore be filled up to the nominal volume, not to the brim. If it is filled to the brim, the contents overflow when the cap is screwed on or remain in the cap and contaminate the liner.

Good to know

The clear material does not protect the contents from light. Preparations containing light-sensitive ingredients, for example vitamin C, retinoids or unstable vegetable oils, spoil faster in clear packaging. Keep such contents in the dark or choose amber or blue packaging.

PET withstands water, diluted alcohol, vegetable oils and common surfactant systems. Undiluted essential oils, acetone and other aggressive solvents can make the plastic cloudy, soften it or damage it. If the formulation contains a higher proportion of such ingredients, run a material compatibility test in a single bottle over several weeks before filling the whole batch.

After thorough washing and disinfection, the bottle can be reused. Before each new filling, check the liner in the cap; if it is damaged or soaked with oil, it stops sealing. Place the empty bottle in plastic recycling, and unscrew the polypropylene cap and dispose of it together with the plastics.

Frequently asked questions