I ordered absurd quantities of various supplies on Monday, including 80 pounds of kitty litter and a 50-pack of razor blades*.
Well, the two huge heavy boxes showed up right on schedule... but by Thursday evening, no sign of a package sized for razor blades. The package tracker showed the blades having been left on my doorstep on Wednesday. WTF?
Eventually, I opened the two big boxes that had shown up... and there, packed right in with a 40-pound sack of kitty litter, was my little box of razor blades.
Yes, functionally it was fine; a stack of ten 5-blade packs in a cardboard shell makes a sturdy assembly, and the huge weight wherewith it shared a box had done no damage in transit. But: packing something small in with something big, heavy, and not-for-immediate-use* is likely to make for confusion.
* Because, after the Lughnasadh zombie apocalypse, no trade goods will be in greater demand than kitty litter and razor blades! Stock up now!
* Not being a big believer in the Just-In-Time supply chain, I tend to stack up a few packages of (for example) kitty litter in the unopened shipping boxes. This ensures that there's supply on hand when it's needed, and the shipping boxes keep the bags safe from inquisitive claws.