The aluminium cap paired with cobalt blue glass is a classic, refined combination: it delivers long-term, airtight closure for preparations where preserving the scent profile and active ingredient content of essential oils over time is the goal. This pack of 156 is designed for those working with their own formulations in serious volumes and seeking durable, reliable packaging.
What the pack of 156 contains
156 cobalt blue glass dropper bottles + 156 aluminium caps. Nominal fill capacity 15 ml, bottle height approximately 65 mm, diameter 28 mm, empty weight 30-35 g each. Total package weight is around 5.15 kg. Country of origin: China.
Cobalt blue glass — UV protection and vintage aesthetics
Cobalt blue glass blocks UV radiation and the shorter (blue-green) wavelengths of visible light, which is especially favourable for storing delicate linalool-based essential oils (lavender, bergamot, ylang, neroli, jasmine). The deep blue tone also gives a characterful vintage apothecary feel. Glass is chemically inert: it does not react with essential oils and contains no plasticisers or other migratable substances that can be a concern with plastic containers.
Aluminium cap — airtight, corrosion-resistant closure
The aluminium cap is chemically inert and corrosion-resistant: it does not react with essential oils, imparts no off-flavours or odours to the contents, and contains no BPA, phthalates, or other plasticisers. The solid metal cap provides a tight, leak-proof seal, preventing evaporation of volatile components and reducing oxidative effects. This combination — airtight sealing plus light blocking — makes the aluminium-capped blue glass bottle particularly well suited to 1-2 year or longer storage of essential oils. Aluminium is also easily recyclable, which is an important consideration for natural cosmetic makers.
Typical areas of use
- Long-term storage and bottling of essential oil blends
- Own small-business perfume line in vintage packaging
- Natural facial serums, skin oils, massage oil bases
- Preservation of botanical tinctures and ethanol-based extracts
- Gift and showcase packaging for essential oil preparations
Cleaning and storage
We recommend rinsing new bottles in warm soapy water before first use, then drying thoroughly. An isopropyl alcohol rinse is the most effective way to remove residual scents. Do not leave the aluminium cap in water for extended periods, and do not clean it in a dishwasher, as the sealing surface may become deformed. Store filled bottles in a cool, dark place for optimal preservation.