As per all our silicone bakeware moulds, these are also oven and freezer proof. Use them from +260deg C to -60deg C. 15 Cell HEART SWIRL - SILICONE CHOCOLATE / CANDY MOULD. This is a 15 cell Heart Swirl chocolate mould which is perfect for making small filled chocolates to put in a chocolate box and ideal to make up an assorted box of types and flavours.