The black plastic screw cap is one of the simplest and most cost-effective closures for small-batch cosmetic or perfume-development work. Combined with the pink, tinted, semi-transparent glass bottle, it creates a packaging unit that appeals to a female audience while keeping the cost of the cap low. This pack of 160 is designed for those working in larger quantities with prototypes, development samples, or simple gift packaging.
What is included in the 160-piece pack
The pack contains 160 pink, tinted, semi-transparent glass bottles, each with a nominal fill capacity of 10 ml, plus 160 matching black plastic screw caps. Bottle height is 57 mm, diameter is 24 mm, and the neck has a standard GL18 thread. Total package weight is approximately 4.93 kg gross, with each empty bottle plus screw cap weighing about 28 g.
Pink glass and light attenuation
The pink colour is a semi-transparent painted layer applied to the outer surface of the glass. The interior of the bottle remains neutral and chemically inert. The tinted layer provides moderate light attenuation along with a fashionable appearance. The liquid level is faintly visible through the semi-transparent colour, making it easy to check the remaining content during use.
Black plastic screw cap details
The black plastic screw cap is made from polypropylene (PP), the food-contact plastic most commonly used in the cosmetic and food industries. Inside, it features a smooth sealing surface that provides a suitable seal for most liquid and viscous cosmetics. IMPORTANT: a plastic cap is NOT recommended for LONG-term storage of pure, strong essential oils — particularly citrus and high-monoterpene varieties, which can soften or discolour it. For short-term use (development samples, prototypes, small-batch gifts) and for cosmetics with lower essential-oil content, it is suitable.
Areas of use
- Cosmetic prototypes and development samples
- Affordable, giftable perfume bases and fragrance samples
- Small-batch tincture and hydrosol packaging (short-term)
- DIY workshop and course participant sample packs
- Development-phase use by an artisan small-business operator
Cleaning and recycling
The glass can be washed with warm water and mild soap; for stubborn fragrance residue, rinse with isopropyl alcohol. Wash the plastic cap by hand, and if essential oils have softened or discoloured it, replace it. The polypropylene cap is recyclable (PP/5 marking), and the glass goes into normal glass collection. Avoid the dishwasher due to the painted layer on the glass.