Martellato Slope Bonbon Mould (20x) 60x20x17mm With the Martellato Slope Bonbon Mould, you can make 20 bonbons in the unique 'Slope' shape. The mould was designed by Philip Khoury, head of the patisserie department at Harrods London. We recommend using Callebaut chocolate for the best results. Fill the bonbons as desired with nuts, ganache liqueur and much more.