Step 1:
I used standard white printer- / copy papers.
Prefold in half

Step 6:
Make 6 sticks for one basket.

Step 5:
Use glue or tape

Step 2:
Cut along the prefolded line.

Step 4:
Now it's easier rolling up the paper.

Step 3:
First, make a few folds on the edge.

Step 10:
Cut along the prefolded lines

Step 8:
Take another paper and fold it in half

Step 9:
Fold in half again and open the model.

Step 7:
Glue the 6 sticks together.

Step 16:
Pressing the model inwards from aside makes the basket more ellipse shaped, see large arrows. Fold the sticks upwards along the edge.

Step 15:
The weaving pattern (above, below a stick) also goes into the direction of the sticks, see small arrow. To keep the weaving pattern going in both directions, it's probably necessary to go above or below two sticks in once sometimes, see large arrows as example.

Step 12:
And fold over these 2 lines.

Step 11:
Fold in half.

Step 14:
Glue a strip to the center, see arrow.
Weave clockwise, above a stick, below a stick etc. Glue/tape a second strip to the woven strip.

Step 13:
Make enough strips for one basket.

Step 19:
The left stick is folded outwards and the stick on the right is folded inwards.

Step 18:
Fold the sticks downwards along the edge, use tape or glue.
The left stick is folded inwards and the stick on the right is folded outwards, see arrows.

Step 17:
Glue/tape another strip to the woven one, see arrow. Now start weaving upwards, making the edge of the basket.