Five-layer cell culture flask meets the need of applications requiring large numbers of cells. While single-layer flasks are well proven for small-scale cell culture scale up, their use can become laborious and time-consuming when large numbers of cells are required. Offering a sterile growth area of 870cm2 in a compact footprint, the new flask offers a high-performance solution to this application need. Providing optical purity with high-pressure moulded 100% USP Class VI virgin crystal polystyrene with a patented low-pressure gas plasma surface treatment, the flask allows cells to adhere more efficiently to the surface by reducing its hydrophobicity. Porvair Sciences