I used Tenugui (= towels made of cotton plain weave cloth) to make a cap to wear in the cooking class.
All you need is a piece of Tenugui (33cm x 90cm), elastic, and a sewing kit.
You can easily make it by hand or by machine.
How to make it roughly
0:00 Materials, etc.
0:14 Fold
0:43 Sew on the elastic
1:07 Sew across the elastic
1:45 Sew on the elastic
2:34 Fold and sew
4:32 Finished!