16 oz. Amber Boston Round Glass Bottle (28/400). Glass bottles keep contents fresh and prevent contamination. Glass does not react with other chemicals, like plastic does, which make glass containers a good fit for essential oils and other liquids. Due to its rigidity, glass is easy to store and It’s a durable material that retains its strength and integrity over time and is not affected by repeated use or recycling. Glass is 100 percent reusable and has one of the fastest turnover times as it can be recycled within 30 days, making it a smart choice for the environmentally conscious.