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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14 Answers

Anonymous 0 Comments

As others have said, stacking and production. But also it prevents from your stuff from getting stuck in the box. This way, pulling upward always work. If they were vertical, then you could deform them sides a bit by pushing something in and it would hard to take it out.

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