And it's as simple as that:
Crochet 28 air stitches. In the first row you start with the firm stitches in the second air stitch seen from the needle. Crochet to the end in firm stitches, form a reverse air stitch and crochet in the scheme about 4 cm high and cast off the stitch. Now crochet a loop of air stitches on one narrow side and sew on the button on the opposite side. Keep in mind that the button should fit through the loop and not be too loose, so that the Braid can later be attached to Position stays on the cup. Sew up all the threads. Simply place the finished crochet-Braid around the cup and button it up.