A collapsible beverage container and method of manufacture thereof, the beverage container being made from a polymer composition of virgin polyethylene terephthalate (vPET), recycled polyethylene terephthalate (rPET), and a scavenging additive configured to prevent O.sub.2 ingress and CO.sub.2 loss. The rPET is present in the polymer composition in an amount of 35 wt % to 70 wt %, more preferably 50 wt %. The polymer composition may include rPET pellets and/or rPET flakes, preferably in an equal amount. The scavenging additive is MXD6 nylon or a non-nylon containing scavenging additive specifically formulated for use with rPET, preferably present in an amount of 4 wt % to 6 wt %. The beverage container is a monolayer container, and the method of manufacture includes stretch blow moulding a preform prepared via injection or extrusion blow moulding.