For very special occasions ? Champagne bottles as a candle set. No birthday cake should be without them: decorative cake candles. Whether plain, as a number or a champagne bottle ? we have many other designs for you. Simply place on top of cream or buttercream cakes and press down a little. For cakes with a fondant, marzipan or chocolate surface, attach the candles to the cake with CMC (food glue) or a little icing.