Introducing the H igh Y ield PER formance Flask M anual (HYPERFlask M) cell culture vessel. The HYPERFlask M vessel is specifically designed for manual use. Originally, the HYPER Flask cell culture vessel was developed for automation. Due to its popularity for use on the bench top, Corning has redesigned the HYPER Flask M vessel with new features. Introducing the H igh Y ield PER formance Flask M anual (HYPERFlask M) cell culture vessel. The HYPERFlask M vessel is specifically designed for manual use. Originally, the HYPER Flask cell culture vessel was developed for automation. Due to its popularity for use on the bench top, Corning has redesigned the HYPER Flask M vessel with new features.