A beverage production system comprising a pack and a module for producing a beverage from said pack, - said pack comprising an ingredient, said ingredient being configured to be mixed with a fluid to produce a beverage, said pack presenting a plane shape oriented along a plane, and the bottom side of said pack being configured for being openable, - said module comprising:. a movable fluid processing device configured to cooperate with the bottom of the pack to introduce a fluid in said pack and to dispense a beverage from the pack, and. a pack holder assembly, said pack holder assembly comprising a pack chamber and a door, wherein:. the pack chamber is adapted for receiving said pack through an upper pack inlet and for holding said pack so that the plane of the plane shape is oriented in an essentially vertical position inside the module, and said chamber presenting a bottom opening configured to enable access of the movable fluid processing device to at least the bottom side of said pack hold in the chamber, the system being characterized in that. the door is movable relatively to the pack chamber and is configured to be positioned in at least:. a first opened position wherein said door uncovers the pack inlet of the pack chamber, and. a second closed position wherein said door covers the pack inlet of the pack chamber and is able to enclose the pack inside the pack chamber, wherein, when the door is in the first opened position, the whole pack holder assembly is removable from the module. - said pack comprising an ingredient, said ingredient being configured to be mixed with a fluid to produce a beverage, said pack presenting a plane shape oriented along a plane, and the bottom side of said pack being configured for being openable, - said module comprising:. a movable fluid processing device configured to cooperate with the bottom of the pack to introduce a fluid in said pack and to dispense a beverage from the pack, and. a pack holder assembly, said pack holder assembly comprising a pack chamber and a door, wherein:. the pack chamber is adapted for receiving said pack through an upper pack inlet and for holding said pack so that the plane of the plane shape is oriented in an essentially vertical position inside the module, and said chamber presenting a bottom opening configured to enable access of the movable fluid processing device to at least the bottom side of said pack hold in the chamber, the system being characterized in that. the door is movable relatively to the pack chamber and is configured to be positioned in at least:. a first opened position wherein said door uncovers the pack inlet of the pack chamber, and. a second closed position wherein said door covers the pack inlet of the pack chamber and is able to enclose the pack inside the pack chamber, wherein, when the door is in the first opened position, the whole pack holder assembly is removable from the module.. a movable fluid processing device configured to cooperate with the bottom of the pack to introduce a fluid in said pack and to dispense a beverage from the pack, and. a pack holder assembly, said pack holder assembly comprising a pack chamber and a door, wherein:. the pack chamber is adapted for receiving said pack through an upper pack inlet and for holding said pack so that the plane of the plane shape is oriented in an essentially vertical position inside the module, and said chamber presenting a bottom opening configured to enable access of the movable fluid processing device to at least the bottom side of said pack hold in the chamber, the system being characterized in that. the door is movable relatively to the pack chamber and is configured to be positioned in at least:. a first opened position wherein said door uncovers the pack inlet of the pack chamber, and. a second closed position wherein said door covers the pack inlet of the pack chamber and is able to enclose the pack inside the pack chamber, wherein, when the door is in the first opened position, the whole pack holder assembly is removable from the module.. the pack chamber is adapted for receiving said pack through an upper pack inlet and for holding said pack so that the plane of the plane shape is oriented in an essentially vertical position inside the module, and said chamber presenting a bottom opening configured to enable access of the movable fluid processing device to at least the bottom side of said pack hold in the chamber, the system being characterized in that. the door is movable relatively to the pack chamber and is configured to be positioned in at least:. a first opened position wherein said door uncovers the pack inlet of the pack chamber, and. a second closed position wherein said door covers the pack inlet of the pack chamber and is able to enclose the pack inside the pack chamber,. a first opened position wherein said door uncovers the pack inlet of the pack chamber, and. a second closed position wherein said door covers the pack inlet of the pack chamber and is able to enclose the pack inside the pack chamber,