Use a square of paper.

1 Valley fold the paper strip in half from bottom to top.

2 Valley fold the bottom edge up to meet the fold-line made in step 1.

3 Valley fold the bottom edge up to meet the fold-line made in step 2.

4 Valley fold the top edge up to meet the fold-line made in step 1. And make the fold-marks as shown.

5 Make the fold-marks and 'valley' crease as shown.

6 Make the creases as shown.

7 Valley fold the paper in half and unfold it.

8 Valley fold the left and right edges to meet the middle fold-line and unfold them.

9 Divide the paper square into eight equal sections by valley folding.

10 Valley fold the right-hand edge over to meet the adjacent horizontal fold-line. Being careful to press the paper only to meet the vertical fold-line as shown.

11 Valley fold the right-hand edge to the left along existing fold-line.

12 Valley fold the layers of the right-hand edge over to meet the adjacent horizontal fold-line as shown.

13 Open out the right-hand flap.

14 Repeat steps 12-13 for other fragments.

15 Divide the top of square into 16 equal sections by valley folding as shown.

16 Make 'valley' folds in each small squares. The fold-line passes from the right top corner in middle of the basis.

17 Step fold the paper as shown.

18 Form the 'valley' and 'mountain' folds along the existing fold-lines as shown.

19 The result.

20 Bring the left- and right-hand sides around and together as shown in the next step.

21 Insert one section of the left-hand side inside the right-hand side on the bottom of the model. At the same time, in the middle of the model, insert one section of the left-hand side inside the right-hand side, thereby making the model three-dimensional.

22 Mountain fold the top edge of the model, thereby making the lock of the model.

23 Bottom view. Begin folding from a double layer, imposing one crease on another.

24 The closed bottom.

25 Vase is ready!