Glass cosmetic tester with clear overcap, 1 ml

A glass cosmetic tester with a transparent cap is a small sample container with a nominal volume of 1 ml, designed for distributing and sending cosmetic samples. The set consists of a clear glass bottle with a thread and a transparent plastic screw cap, supplied complete and ready to fill. It is suitable wherever a customer needs to try a product first: samples of fragrance compositions, aromatic and essential oils, facial serums, oil blends or tinctures.

Clear glass reveals the colour and clarity of the contents and does not react with common cosmetic ingredients, so the sample remains true to the original product in both scent and appearance. The transparent cap lets the contents stand out, and once a label is applied the tester looks cohesive. The set is declared suitable for contact with cosmetic products; the declaration of conformity for both components can be found with the product.

What the tester is suitable for

• Samples of perfumes and fragrance compositions – one millilitre is enough for several applications and the customer can verify the scent directly on the skin, not just from a strip.
• Samples of serums and oils – a small amount of facial serum, oil blend or liquid active ingredient for two to three applications without giving away a full-size package.
• Sending with an order – the tester is light and compact, fits into an envelope or alongside a parcel as a gift or preview of a new product.
• Formulator's own work – setting aside a small batch sample for comparing scent or colour, monitoring the stability of a composition in light, or transferring a working sample.
• Repeated filling – if you use the testers more than once, the glass bottle can be washed and refilled; simply clean or replace the cap.

Filling and volume

The nominal volume is the volume for which the tester is designed under normal filling conditions. The total capacity to the rim is greater, because the bottle space extends up to the neck. The difference between them is the headspace for the cap and for expansion of the contents when the temperature changes. The tester should therefore be filled to the nominal volume, not to the brim. An overfilled bottle will overflow when the cap is screwed on, and the contents on the thread will soil the label and hands.

With such a small neck, the most convenient filling method is a dropper, a needleless syringe or a small funnel. Thicker serums should be filled slowly to prevent an air bubble from forming in the narrow bottle, which would take up part of the volume.

Good to know

Before first use, we recommend washing the bottles and caps and disinfecting them with isopropyl alcohol or ethanol, then allowing them to dry completely. Residual water in one millilitre of content means significant dilution, and in anhydrous products it can cause cloudiness.

Clear glass does not protect the contents from light. For short-term samples that the customer will use within a few weeks, this is not a concern. However, if you are filling sensitive ingredients, such as blends with a high proportion of unsaturated oils or compositions with citrus essential oils, store the testers in the dark until they are handed over.

The cap is plastic. With concentrated essential oils, pure fragrance compositions or contents with a higher proportion of solvents, we recommend testing the cap's behaviour with the specific content: fill one tester as a trial, let it stand for a few days and check both the seal and whether the cap changes appearance.

A practical approach is to number or code the testers and attach a sample list on a separate card.

The glass bottle goes in the glass recycling and the plastic cap in the plastics recycling; simply separate the two parts before disposal.

Frequently asked questions