Martellato Chocolate Hollow Form Christmas Tree (1x) Ø 104 h 180 mm A Christmas tree comes to most people from the ground or from a box, but not this Christmas tree. This diamond-shaped Christmas tree comes out of the shape of Martellato. Are you making a chocolate Christmas tree? If so, try working with food colouring on your chocolate tree too, you can create a green or even glitter effect.