White Plastic Bottle, HDPE, Saftey Cap, 500 ml

HDPE plastic bottle, white with child-resistant cap, 500 ml is a ready-made combination of an HDPE bottle and a plastic child-resistant cap with a 28/410 neck finish. It is intended for products that should not be easily accessible to children – liquid preparations with higher alcohol content, concentrated cleaning and laundry products from home production, solutions with essential oils, or massage and bath oils. It works equally well for standard rinse-off cosmetics such as shampoos, shower gels or liquid soaps, where the child-resistant closure is an added bonus.

The set withstands normal handling in the bathroom, workshop and during transport, and is declared suitable for contact with cosmetic products.

Key features

• Child-resistant closure – the cap cannot be opened by simple turning like a standard screw cap. It restricts children's access to the contents, which is important for alcohol-based solutions, concentrates or preparations with a higher proportion of essential oils.
• Opaque material – white HDPE does not transmit light the way clear plastic does, so it helps protect light-sensitive ingredients such as vegetable oils or fragrance compositions. The contents are not visible, but the bottle labels well and has a clean appearance.
• Plastic durability – HDPE is rigid, flexible and resistant to water and common surfactants. The cap is made of PP, which retains its shape even after repeated opening.
• Squeezable wall – the bottle is slightly squeezable, which makes dispensing thicker liquids easier.
• Volume 500 ml – a practical size for a family-sized shower gel, a liquid soap refill for a dispenser, or a homemade cleaning concentrate diluted into a spray bottle.
• Low weight – plastic significantly reduces the weight of the shipment compared to glass of the same volume, and there is no risk of breakage if dropped.

Filling and closing

The bottle should be filled to the nominal volume, not to the brim. The nominal volume is the quantity the container is designed for under normal filling conditions; the total volume up to the neck is greater. The difference provides headspace for the closure and for the expansion of the contents when the temperature changes, so the bottle does not get pressurised when closed or during transport, and the contents do not seep into the thread. If you fill to the brim, the closure touches the liquid surface and the seal deteriorates.

Tighten the child-resistant cap fully. Before filling for the first time, we recommend testing the closing and opening on an empty bottle to confirm that the cap has seated correctly in the thread and can be opened as expected. When using your own combination with a different closure of the same neck type, verify the seal and the behaviour of the packaging with the specific formulation; ready-made bottle + closure combinations are available in the Handymade range.

Suitable for products such as

• Rinse-off cosmetics – shampoos, shower gels, liquid soaps, bath foams. HDPE is resistant to surfactant systems and the squeezable wall makes dispensing easier.
• Massage and bath oils – vegetable oils and blends with essential oils, where the opaque packaging protects against light and the child-resistant closure prevents accidental opening.
• Alcohol-based solutions and tinctures – packaging with a child-resistant cap is suitable where the contents should not be freely accessible. At higher alcohol concentrations, we recommend verifying the behaviour of the plastic in the finished product.
• Homemade cleaning products – dilution concentrates, dish or floor cleaning products made from surfactants, soda or citric acid. For strongly alkaline or acidic concentrates, verify the resistance of the closure in practice.
• Hydrosols and tonics in larger packaging – as a bulk container from which the product is decanted into smaller spray bottles.

What is good to know

Preparation before first filling. We recommend washing and rinsing both the bottle and the cap, disinfecting with isopropyl alcohol or ethanol, and leaving them to dry completely upside down. Residual water in the container is a common cause of early deterioration of anhydrous products and weakens the preservative system of water-based products.

HDPE and essential oils. Diluted essential oils in a cosmetic product are normally tolerated by HDPE. At high concentrations, with neat essential oils, citrus terpenes and certain solvents, the plastic may soften over time, absorb the scent or deform, so glass is more suitable for concentrates.

Temperature during filling. Do not fill HDPE with hot products. Allow emulsions, gels and soaps to cool to room temperature, otherwise the bottle may deform and contract as it cools after closing.

Reuse and labelling. The set can be reused after thorough washing, but check the cap thread – if it has loosened after many opening cycles, the safety function is no longer reliable. The cylindrical wall of the bottle labels well.

Food contact. The food-contact certification applies separately to the 28/410 plastic child-resistant cap. The set as a whole is intended for cosmetics and food use is not declared for it.

Recycling. Both the HDPE bottle and the PP cap are among commonly recyclable plastics; once empty, simply rinse them and place in the plastics collection.

Frequently asked questions