Abstract: Disclosed herein are glass pharmaceutical vials having sidewalls of reduced thickness. In embodiments, the glass pharmaceutical vial may include a glass body comprising a sidewall enclosing an interior volume. An outer diameter D of the glass body is equal to a diameter d1 of a glass vial of size X as defined by ISO 8362-1, wherein X is one of 2R, 3R, 4R, 6R, 8R, 10R, 15R, 20R, 25R, 30R, 50R, and 100R as defined by ISO 8362-1. However, the sidewall of the glass pharmaceutical vial comprises an average wall thickness Ti that is less than or equal to 0.85*s1, wherein s1 is a wall thickness of the glass vial of size X as defined by ISO 8362-1 and X is one of 2R, 3R, 4R, 6R, 8R, 10R, 15R, 20R, 25R, 30R, 50R, and 100R as defined by ISO 8362-1.