After leaving for a night, fully expecting food items to rot away in the inventory - i didn't pay much attention to it in the morning, but when i wanted to make another salad - suddenly i've noticed the absence of a bowl ( which i always keep on me ).
After testing it by putting a filled bowl inside a crate and leaving it there (no one entered the server and it was a secure safehouse) - same thing happened, it dissapeared alongside the bowl.
Didn't try it with cooking pots - but i'd assume it might happen also.