I'm guessing the cat jumped into the box. The only other possible scenario would be OP picking up the cat and consciously packing it.

Cats tend to like boxes and dark spaces. It probably hopped in a box when you weren't looking for a shady spot to nap.

Technically she packed herself.

They tend to do that....getting into places unnoticed. After being stuck in my closet for a day, my cat is pretty good about making his presence known and getting out when I tell him to

Been there done that. My orange tabby accidentally got packed. Technically he packed himself but he was only in the box for a short time and was the first thing I unpacked

Your life is going to suck more once you open the box. Have fun ;)

I don't know, cats love nothing more than cardboard boxes. Maybe it packed itself

lmao I think your cat snuck in one box. Cats like boxes.

Poor cat!

From what I've seen from my best friend's cats, they would have just packed themselves. Those buggers and boxes..