The unique, low-profile design of the Nunclon D SoLo Flask increases the amount of usable growth surface, while optimizing incubator and storage space. The SoLo flask offers an expanded 185cm 2 culture area within the same external dimensions as a 150cm 2 flask. As a result, four SoLo flasks can be stacked in the same space as three conventional flasks. The large bore, angled neck facilitates pipette and cell scraper access to the 185cm 2 growth surface. The special, flat bottom, tapered shoulder area provides stability to prevent media from splashing into the flask neck during handling.