Make your own hot box

You will need: A square box or container at least 5 cm larger than your pot on all sides, 2-3 metres fabric, newspaper, small pieces of polystyrene as used in packing.
Method: Take the following measurements: diameter of pot = a, height of pot = b, Height of box = c , side of box = d.
Cut out 2 squares of newspaper, one with sides of a, one with sides of d. Fold them both diagonally in quarters and cut out one quarter of each.
On a large sheet of newspaper cut out the following pattern.   Add 1,5 cm all around for seams.   Using the newspaper pattern, cut 4 identical pieces from the fabric.

Sew all 4 pieces together, right sides together , leaving one diagonal open. Turn right side out. Half fill the cushion with the polystyrene and then close up the opening. Arrange the cushion in the box with the base (d) downwards. Form the narrow top part into a nest inside the cushion. It should be just big enough for your largest pot. Make another cushion for the lid out of two square pieces of material the length of the base of the box. Fill with the polystyrene. Alternatively you could use a pillow as the lid.