Falcon Petri Flasks, Polystyrene, Sterile, BD Biosciences-Petri flasks have not been tissue culture treated, providing a surface that is more hydrophobic than a tissue culture surface and similar to a bacteriological petri dish surface. Canted neck style with standard polyethylene plug seal caps. Caps are white to distinguish non-tissue culture from tissue culture treated flasks. Flasks are sterilized by gamma irradiation. Nonpyrogenic. Ordering Information: Supplied sterile, with caps.