Metal trash cans - the ones I have at the barn don't have a handle on the top - but the lid has a rim around it about an inch or so wide - no problem with getting water in from the top, I don't remember if there are handles on the sides - I ~think so, and those would have the moisture leak. Though the one I have for chicken feed I put duct tape over any rivets on the inside and that solved the water problem.
I marked the inside of the cans at the barn so if I asked how much was left I got an answer that we all understood.
View attachment 116770