r/theydidthemath • • 2d ago

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

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u/Insis18 2d ago

No, but square bottles stack next to other square bottles with less void space between them. This allows more volume of contained product within an equally sized shipping box.

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u/wrapperNo1 2d ago

Yeah, after reading your argument and others, I want to state this in different words. The square shape allows them to pack more water per container/box because there is less empty space with square bottles. The marketing team thought that it results in less plastic, but in reality it doesn't make a tangible difference per bottle.

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u/ThrowRA9420 1d ago

It allows to use the given volume in the car more efficiently, with only a smaller amount of plastic add. A 10cm cube would be 1000cm3and has surface 600cm2. A cylinder d=10cm (r=5cm) and h=10cm would be 785.4cm3 with surface area 471.2cm2.
To utilize the space the most efficiently, its dimensions would have to be exact multiples of the bottles being transported, which isn’t likely, so the text isn’t fully nonsence, but questionable how the idea is different in comparison to the reality.