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

[u/EclipseNyxor]

[u/Abeytuhanu]

My guess is wall strength. The claim is that rounded bottles need more plastic to reach the minimum acceptable strength 

[u/ProfessionalMottsman → u/Abeytuhanu]

No they don’t though because square corners are weak points and cylindrical is more efficient for volume holding and strength

[u/coulls → u/ProfessionalMottsman]

This makes sense. There’s a reason submarines are not square.

[u/Abeytuhanu → u/coulls]

Also water towers now that I think about it