Abstract: A tissue culture flask includes a container main body comprising a box having a bottom surface for supporting a substance to be cultured, a side surface, and an upper surface. A cylindrical neck is provided on the side surface of the container main body to communicate with the interior of the container main body, and extends obliquely upward with respect to the bottom surface and defining a first opening at an end located away from the container main body and a second opening opposite the first opening.

Abstract: A liquid applicator includes a case for containing a liquid and an applying member, housed in the case, for applying the liquid. The case is broken to expose the applying member, thereby allowing application of the liquid via the applying member. The shape of the distal end face of the applying member is formed to be substantially rhombic or elliptic so that the thickness in one direction is larger than the thickness in another direction perpendicular to the one direction. By moving the distal end face of the applying member in the another direction perpendicular to the one direction, the liquid can be applied on a wide affected part within a short time period.