Container assembly for collecting biological specimens

A container assembly for collecting a tissue sample, said container assembly comprising a container having a chamber therein, said chamber being configured to receive the tissue sample;

• and a cap configured to be attached to said container to close off said chamber, said cap including a base section, which is configured to be attached to said container, and a movable section, which is configured to be movably coupled to said base section, said base section and said movable section being configured to form a reservoir therebetween, said reservoir being configured so as to contain a solution, said base section including at least one opening in fluid communication with said chamber when said cap is attached to said container, said movable section being movable relative to said base section between a closed position, in which said movable section engages said base section so as to block off fluid communication between said reservoir and said at least one opening such that the solution is contained in said reservoir, and an open position, in which said reservoir is in fluid communication with said at least one opening for discharging the solution from said reservoir into said chamber through said at least one opening.