At Banyan, we take multiple factors into account in making decisions, including quality, customer service, economics, and our impact on the environment.
The plastic that we use is PET (#1) and HDPE (#2), which is highly recyclable. Fewer resources (water, electricity, mining equipment, etc.) are used in the production of these plastic bottles versus glass. Also, given the lighter weight and durability of these plastics compared to glass, there is a smaller carbon footprint created by the shipping of these materials.
PET and HDPE are BPA-free and considered safe as containers, though they should not be re-used. For any products that are filled hot (balms, ghee, Chyavanprash), we use glass containers instead of plastic.