Why does the toilet paper in the hotel bathroom fold into a triangle?

You mean wiping toilet paper? In the classification of toilet paper packaging, this three fold is called N fold, and another two fold is called V fold, which is very vivid! Japan and South Korea generally like to use V-fold, while China is used to using N-fold.

The two-fold area is one-third less than the three-fold area, which is of course more economical. One more thing, most people don't just use one piece of paper to wipe their hands, but choose two pieces of paper. One piece of N-folded paper can't be washed cleanly, and two pieces are wasted, so V-folded paper is popular in Japan and South Korea now, which is more economical.