What are common types of Pharmaceutical Coil?

There are three common types of coil that are offered; cotton, rayon and polyester. Cotton is a natural fiber that is biodegradable and absorbs moisture created by tablets or capsules inside the bottle. Rayon is a synthetic fiber used to provide as a filler inside a container or bottle during transit to prevent tablets or capsules from damage. Polyester is a petroleum product that is odorless, soft, and resilient in material used for packaging soft-gel capsules.