What are plastic or glass containers with rubber closures commonly referred to as?

The term used to describe plastic or glass containers with rubber closures is vials. Vials are specifically designed to store small quantities of medications or laboratory samples, and their rubber closures enable the use of syringes to withdraw the contents while maintaining the sterility and integrity of the substance inside. This is particularly important in sterile compounding, where maintaining a sterile environment is crucial for patient safety.

Vials are distinct from ampules, which are sealed glass containers that typically do not have closures and are meant to be broken open for access to the liquid inside. Flasks and bottles can serve various purposes and are generally larger containers, often without the specific design and closure mechanisms that characterize vials. Understanding the role of vials in pharmacy practice helps ensure the proper handling and dispensing of medications.