Step 1:
Prefold in half over these four lines.

Step 6:
Fold over these two lines.

Step 5:
Fold over the two upper lines and prefold over the other three lines, use the arrow as help.

Step 2:
This is the other side.
Fold the corners a little off the center.

Step 4:
Fold both edges to the centerline.

Step 3:
Fold the corners a little off the center, making a white cross.

Step 10:
Fold into a straight angle two times, see white lines.
And fold the handle straight upwards.

Step 8:
Fold the four corners inwards and the edges straight upwards over the white lines.

Step 9:
Glue / tape the edges together, see marked areas.

Step 7:
Prefold and turn the model

Step 11:
Press the lower part into the upper part.....