Device for containing a fluid substance

A device for containing a fluid substance, comprising:

• a bag comprising at least one flexible side wall,
• a substantially rigid neck extending from said bag and delimiting an opening giving access to an internal cavity of said bag, said neck being shaped to at least partially accommodate a pumping member for pumping said fluid substance, and provided with connection means for its connection to an external container,
• wherein the bag is made from a multilayer material, and the neck his made from a material different from that of the bag and comprises a cup-shaped element comprising a bottom wall provided with at least one opening, and a side wall on the outer surface of which the upper edge of the bag is hermetically connected;
• wherein said device comprises a valve element suitable for being moved at least from an opening position, wherein said valve element allows to access said internal cavity of the bag, and a closing position, wherein said valve element inhibits the access to said internal cavity of the bag;
• wherein the valve element is arranged at the neck of the bag,
• wherein the valve element comprises:
• a fixed part connected to the neck of the bag, delimiting a passage channel for the passage of the fluid substance, and
• a moveable part provided with a breakable internal member which closes said passage channel, wherein said movable part is suitable for being moved between
• said closing position comprising a first operating position, wherein said movable part contacts the fixed part, and said fixed part does not interfere with said breakable internal member, and said moveable part with said breakable internal member closes said passage channel,
• said opening position comprising a second operating position, wherein said movable part with said breakable internal member is spaced from said fixed part and leaves said passage channel open, and said fixed part does not interfere with said breakable internal member.