Today in 1967, US Patent 3298575 A was issued, an invention of Norman Bernard Larsen, for his “Disposable Dispensing Container.” There’s no Abstract, although in the description it includes this summary:
This invention relates to a lightweight disposable or expendable container. Preferably, the container is a square or rectangular one-gallon container for draught type beer.
Reminds me of the plastic growlers from the 80’s that came in boxes.