Every cat owner probably has seen their cat(s) sleeping in boxes from time to time. My two cats love boxes which presumably makes them feel safe and secure since they know they can’t be attacked from 3 sides and they can see who is coming at them from the front. Those boxes sent by sellers on Shopee are useful as they serve as sleeping enclosures for the cats.
Cats probably find warmth in a cardboard box especially on rainy days which is almost every day nowadays. I think cats are cute but they are extra cute when they are resting or sleeping in cardboard boxes. Can’t resist taking their photos every time they are in one.