Abstract: A container (1) for storing stem cell material of an animal for subsequent treatment of the animal contains discrete pouches (15) for the stem cell material. The container (1) comprises a pair of transparent flexible panels (3) which are secured together by a peripheral heat seal (4) to define a hollow interior region (8). The hollow interior region (8) is divided into discrete pouches (15) and a mixing region (16) by primary heat seals (18) extending substantially perpendicularly from the peripheral seal (4) adjacent an edge (5a) of the panels (3). An inlet port (9) to the mixing region (16) accommodates the stem cell material and a protective solution to be mixed in the mixing region (18). A manifold (25) extending transversely of the pouches (15) communicates the pouches (15) with the mixing region (16). On completion of mixing of the stem cell material with the protective solution, two additional pouches (22) are formed in the mixing area (16) by primary heat seals (34).