1 oz. (30 ml.) cobalt blue glass Boston Round bottle, 20 mm (20-400) neck finish, packaged with a black polypropylene (PP) plastic cap with a poly cone insert. Boston rounds have a rounded shoulder and rounded base, making them popular in personal care packaging but also appropriate for applications in other industries. The cap's poly cone liner acts as a wedge insert that seals the lip and the inner neck of a bottle, providing extra protection from leakage.
- Round shoulder and base
- Iconic and classic shape
- Easy to label and showcase content
- Strong and heavy bottle
- Also known as Winchester bottles
Cobalt Blue Glass - Cobalt blue glass provides moderate light protection to light-sensitive products and is suitable for essential oils, natural cosmetics, food products, extracts, and select pharmaceutical drugs. Cobalt oxide is used to create the blue glass. A reduced form of blue glass (blue-green glass) is rare but can be made by eliminating the surfer and using only iron and carbon. The Cary Company carries cobalt blue glass packers, oblongs, and boston rounds.
This information has been provided as a general guide. It is the customer's responsibility to select the proper container for product and application compatibility.