| abstract |
A preform comprising a neck portion and a body portion having a wall portion an end cap, the body portion comprising a first layer and a second layer, the second layer, the second layer comprising an expandable material; a preform comprising a threaded neck portion and a body portion including a wall portio: and an end cap, the body portion comprising expandable material adapted to produce foam when activated; methods of forming the preforms; the bottles manufactured and methods of injection moulding using multiple gates, outlets, exhaust systems or mould cavities. |