Available here are 1 oz blue glass boston round bottles paired with black phenolic cone lined caps. The glass boston round bottles are impermeable and nonporous, preventing any product interaction and helping to maintain freshness. These small glass bottles also feature sloped shoulders and a narrow neck. Cobalt blue glass provides adequate UV protection to keep light sensitive products maintained when storing. Black phenolic cone lined caps fit snugly into the neck of the small blue glass bottles to provide an added layer of sealing while closed. Test these blue glass boston round bottles for packaging a wide variety of products.