The 20 ml size is one of the most widely used bottles in the intermediate category: substantial enough to hold an essential oil synergy or a face serum, yet still hand-friendly and travel-practical. This 156-piece pack ships with aluminium caps, the most frequently chosen solution for stock storage and longer-term preservation.
What this 156-piece pack contains
156 amber 20 ml glass dropper bottles and 156 matching aluminium caps. Bottles measure approximately 75 mm in height and 30 mm in diameter, with an empty unit weight of around 30 g. The total package weight is approximately 5.15 kg. The neck uses a standard GL18 thread, compatible with most replacement caps in this category.
Amber glass and UV protection
Amber glass effectively filters out the shorter wavelengths of visible light and most of the UV spectrum — these photocatalysts initiate the breakdown of sensitive compounds in essential oils and botanical extracts. Stored in amber bottles, the scent profile and active ingredient content retain their original quality significantly longer. Glass is chemically neutral and neither transfers nor extracts any substance to or from the contents.
Aluminium cap details
The aluminium cap is a solid metal closure with a foam or polycone liner — delivering a tight, leak-proof seal without interfering with the chemical composition of the contents. Aluminium is chemically inert, does not react with the more aggressive components of essential oils (such as citrus monoterpenes), and contains no BPA, phthalates or other plasticisers. It is corrosion-resistant, easily recyclable, and imparts no off-flavour or odour.
Areas of use
- Storage of essential oil blends and aromatherapy synergies
- Bottling of natural face serums and skincare oils
- Longer-term storage of botanical tinctures and hydrosols
- Perfume bases and fragrance compositions
- Private-label cosmetic formulations
Cleaning and reuse
Wash the bottle in warm soapy water, rinse with food-grade alcohol to remove scent residue, and let air-dry. Avoid the dishwasher, which may damage any labels. Glass and aluminium are each infinitely recyclable when separated.