A full cookware set nests together naturally, which is convenient for storage but risky for moving since bare metal against metal is what scratches nonstick and stainless finishes. Paper between every piece solves that in a few extra minutes.
Pro tip: Nest pans with the same size lid stack together so unpacking naturally sorts itself back into matching sets.
Watch out: Never stack a full set of nested pots and pans into one oversized box; the combined weight can make the box impossible to lift safely or cause the bottom to fail.