A flexible transport container (1) includes an inner bag (10) formed by a flat casing closed at one end (12), the other end (13) of which is folded towards the first end. The inner bag is housed inside an outer bag (20) formed by a casing provided with a first access port (25) which extends through the two bags close to the closed end of the inner bag and a second access port (27) which only extends through the wall of the outer bag opposite a portion of the folded end of the inner bag.