1. A container (300) assembly comprising: a container (1) for storing a tissue sample (45)； wherein said container (1) contains a bottom (13)； - a cap (2) adapted to engage with said container (1), wherein said cap (2) contains: - an upper element (21) containing a reservoir (211) wherein said reservoir (211) is adapted to contain a preservative, a seal (22) for tightly closing said reservoir (211)； a piercing element (323) to break said seal (22) by displacing said piercing element (323 )； moreover, the container (300) in the assembly has the first and second positions, and in the first In this position, the container (1) is isolated from the tank (211), and in the second position between the tank (211) and the container (1) a fluid connection is provided, characterized in that the container (300) in the assembly contains a separator (31) located between the seal and the bottom (13) of the container (1), and the separator (31) has at least one opening (291) adapted to allow the passage of fluid between the tank (211) and the container (1) .2. The container (300) according to claim 1, further comprising a space (11) between the separator (31) and the seal (22), while the separator (31) is equipped with a channel (30) adapted to allow the passage of fluid between the space (11) and container (1). 3. A container according to claim 2, characterized in that the channel (30) contains an opening located above the level of the preservative after the seal is broken (22) .4. A container (300) according to claim 1, characterized in that the cap (2) forms a lid. 5. A container (300) according to claim 1, characterized in that the cap (2) contains a membrane (28) having a substantially convex shape in the first half1. Контейнер (300) в сборе, содержащий:- контейнер (1) для хранения образца (45) ткани； при этом указанный контейнер (1) содержит дно (13)；- колпак (2), приспособленный для сцепления с указанным контейнером (1), при этом указанный колпак (2) содержит:- верхний элемен
