How to make an Origami Cup that holds water

This video is a tutorial on how to make an origami cup that holds water. For this design you will need a square sheet of paper. I am using a more plastic-y type of origami paper and I found my cup held water for almost 5 minutes.
I did not come up with this, and I do not take credit for it.

Видео How to make an Origami Cup that holds water канала origamicrocus