Corning® Ultra-Low Attachment 25cm² Rectangular Canted Neck Cell Culture Flask with Vent Cap by Corning Life Sciences

"Corning is generally a producer of high quality cell consumables and one of our go to vendors. We purchased the ULA Flasks in both a T-25 and T-75 format for cell culture and production of 3D spheroids. Pros: Flask came nicely packaged and made of plastics that showcase Corning's higher quality. No broken flasks. Cells don't stick to bottom. Clear to image on microscope. Cons: Uncontrollable spheroid size formation. Spheroids move around very easily and we see spheroids merge into larger structures as well. A low seeding densities, this might work, however at high densities, this becomes an issue."