The 100 ml size is convenient in the artisan cosmetics world: larger than the typical serum format but still easy to hold. If you need a simple, fast-closing cap for the bottle — for example for daily-use preparations — the black plastic screw cap is the practical choice. This pack of 70 cobalt blue 100 ml dropper bottles has been designed specifically for this kind of use.
What is included in the 70-piece pack
The pack contains 70 cobalt blue glass dropper bottles of 100 ml each, every one fitted with a black plastic screw cap. Bottle height is approximately 130 mm, diameter approximately 52 mm, with a standard GL18 neck. The weight per bottle with cap is around 120 g, and the total gross weight of the pack is approximately 9.24 kg. A dropper insert (orifice reducer) in the centre of the cap ensures even drop-by-drop dispensing when the bottle is tilted.
Cobalt blue glass and light protection
Cobalt blue glass effectively filters UV radiation as well as the shorter wavelengths of visible light. These are the wavelengths that most rapidly degrade the sensitive compounds in essential oils and plant oils. The deep cobalt colour is therefore a functional choice: preparations stored inside — body oils, massage oils, hydrosols, tinctures — retain reliable quality for longer. The glass is also chemically inert and releases no plasticisers or other migratable substances.
Black plastic screw cap — simple, reliable closure
The screw cap fits the bottle with a GL18 thread and closes with a single turning motion. Inside the cap is a dropper insert that releases liquid drop by drop when the bottle is tilted — precise dispensing with no spillage. The plastic is lightweight, shatter-resistant, and provides a neutral contact surface for most essential oils and plant oils. A cost-effective alternative to pipette or aluminium-cap versions, especially when use is daily and quick.
Areas of use
- Body oils, massage oils for daily routines
- Bottling your own natural cosmetic line
- Hydrosols, herbal water solutions
- Essential oil blends and serums for everyday use
- A standard packaging item for own-label products
Cleaning and reuse
Rinse new bottles with warm water and a small amount of detergent. Isopropyl or food-grade alcohol is most effective for removing fragrance residue. Remove the cap from the bottle and clean it separately — the plastic screw cap is hand-washable, but a dishwasher is not recommended (high heat can deform it). Allow everything to dry completely before refilling. With appropriate care the bottle can be reused for many years, and the screw cap can be inexpensively replaced if it wears out.