Plastic bottle, blue, plastic PushLock cap, white, 200 ml

The blue plastic bottle with a volume of 200 ml and a white PushLock cap forms a ready-to-use set for filling liquid and thin cosmetics. The bottle is made of PET, so it is lightweight and does not break if dropped in the bathroom. The blue tint gives it a distinctive look that can be used to tell product lines apart.

The neck of the bottle has a 24/410 neck finish that the cap fits precisely. The set as a whole is declared suitable for contact with cosmetics.

What the set is suitable for

• Toners, hydrosols and micellar waters – thin water-based products are easy to dispense from the bottle, and 200 ml lasts for several weeks of use.
• Shampoos, shower gels and liquid soaps – rinse-off products for which 200 ml is a common consumer size.
• Body and massage oils – with a higher proportion of essential oils, we recommend testing how PET behaves first; details are below.
• Facial lotions and thin emulsions – thick creams are difficult to dispense through the cap, so a jar or pump is more suitable for them.

Nominal volume and filling headroom

The 200 ml volume stated for the bottle is its nominal volume, that is, the amount the packaging is designed for under normal filling. The physical volume of the bottle up to the rim of the neck is larger. The difference serves as headroom for the cap, for the air cushion above the surface and for the expansion of the contents when the temperature changes. The bottle is therefore filled to the nominal volume, not to the neck. If it is overfilled, the contents are pushed into the thread when the bottle is closed, and the cap may then fail to seal.

What to know when working with a PET bottle

Before the first filling, rinse the bottle and the cap, disinfect them with isopropyl alcohol or ethanol and let them dry completely. Residual water in the thread or at the bottom will dilute the first portion of the product.

PET is not filled hot. A finished emulsion or liquid soap should be left to cool to room temperature before filling, otherwise the wall of the bottle may deform. Likewise, the bottle must not be exposed to radiant heat during drying.

For anhydrous products with a high proportion of essential oils, for pure essential oils and for products with a high alcohol or solvent content, the behaviour of PET cannot be guaranteed in advance. Some ingredients may soften or cloud the plastic. For such formulations, we recommend testing one bottle over several weeks, or choosing glass instead.

After washing and disinfection, the bottle can be refilled, provided it is not deformed and the thread seals. At the end of its life, both the PET bottle and the PP cap go in the separate collection for plastics. Other closures with the same neck type from the Handymade range also fit the 24/410 neck; ready-made combinations have a separate description.

Frequently asked questions