How to make a simple 3D origami cup

(page 11)

19th picture of simple 3D origami cup

19.

Apply the horizontal "valley-fold" of the step #18.

Prepare to apply a horizontal "mountain-fold" .

20th picture of simple 3D origami cup

20.

Apply the horizontal "mountain-fold" of the step #19.

Prepare to apply another horizontal "mountain-fold" .