Why are the sides of plastic storage containers sloped?

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Most large plastic storage containers like those produced by sterilite have sloped sides so that the top is wider than the base. This of course means that when placed side by side there is a large gap between them of wasted space. Is there a reason for this? Easier to manufacture? Structural integrity?

Edit: Thank you very much to all of you for your responses!

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Anonymous 0 Comments

So u/Buttleston has given a complete/accurate answer for this.

What I’d add is that shipping is important. The plastic containers take up a lot of volume and don’t weigh very much – so in industry terms, the trucks that transport them usually “cube out”, meaning the trucks are filled by volume and not by space. The trucks end up shipping a lot of air. So the final price to the consumer is affected by the trucking realities.

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