Alexis' How To Center
Material:
You need 1 sheet of square paper.
Step
1: Fold the paper so it looks like a triangle.
Step 2: Fold the bottom left hand corner to the middle of the right side.
Step 3: Flip the paper over and fold the bottom, left hand corner to the middle of the right side.
Step
4: Fold the tabs down, which are at the top, between the lips of the cup.