Lined Paper Margins
The margins on lined papers came from a time when rat infestations were common. In those days, rats would chew on the sides of papers. The margins prevented them from getting to the important parts.
Paper Condiment Bowls
Fries would not taste good if you did not eat them with a lot of ketchup! Do you have to run back to the refill station because the paper condiment cups were so small? You can actually unfold them like this.