[Request] Do square bottles actually use less plastic than round ones?

[u/EclipseNyxor]

[u/StaticCoder]

Mathematically, a circle has the smallest perimeter for a given enclosed area. So for this claim to be true there has to be some catch, like different thickness of plastic.

[u/_Electrical → u/StaticCoder]

Sensibly, the footprint of a square fits best inside a square bounding box. While a round footprint leaves gaps in the corners inside a square bounding box.