riForest Fernbach culture flasks are sterile and designed for single use, however, it can be autoclaved and reused multiple times. They are ideal for all shaker/suspension culture. Like all TriForest Erlenmeyer flasks, the 3L Fernbach flasks come with the patented DuoCAP®. They are certified pyrogen and nuclease free. These flasks are available with or without baffles and are a complementary addition to TriForest Erlenmeyer Family.