The Thomson Optimum Growth® Family of products is expanding into downstream processing with a revolutionary new technology that allows high speed clarification of cellular material. Simply switch the standard vented Optimum Growth® Cap to the Rapid Clear® Cap (patented). The only equipment required is a peristaltic pump. In initial testing, the Rapid Clear® Cap can filter up to 2.5L-3L of high density culture [6x10^6 -20x10^6 @ >70% viability] in approximately 18 minutes. At lower or higher densities and viabilities the total volume and processing speeds will differ. This technique will transform the time consuming and laborious process of harvesting cells to a rapid, walk away procedure.