Method and mould system

A receptacle produced by the process comprising:

• providing a mould;
• providing a partially formed receptacle within the mould;
• providing an expandable member, in a first configuration, within the partially formed receptacle;
• moving the expandable member, in the first configuration, into contact with a base of the partially formed receptacle such that the expandable member deforms toward a periphery of the base of the partially formed receptacle;
• and
• inserting fluid into the expandable member to expand the expandable member from the first configuration to a second configuration more expanded than the first configuration so as to urge the partially formed receptacle against an inner surface of the mould during a process to form the receptacle from the partially formed receptacle.

A mould system comprising:

• a mould for receiving a partially formed receptacle;
• an expandable member;
• a pump fluidically connected to the expandable member;
• and
• a controller,
• wherein, when the expandable member is in a first configuration and provided within the partially formed receptacle, the controller is configured to:
• cause the expandable member to move into contact with a base of the partially formed receptacle such that the expandable member deforms toward a periphery of the base of the partially formed receptacle;
• and
• cause the pump to insert fluid into the expandable member to expand the expandable member from the first configuration to a second configuration more expanded than the first configuration so as to urge the partially formed receptacle against an inner surface of the mould during a process to form the receptacle from the partially formed receptacle.