The Allegra Collection is designed to be customised with the Allegra Magnifying Essences. Bulgari says:
Your personalised scent starts here. Choose your preferred Eau de Parfum among the five extraordinary signatures. From the highest-quality harvest, each signature conveys one of the most intense Italian emotions. Choose the Eau de Parfum that suits your mood and create your unique signature by adding your favourite MAGNIFYING essence and #MagnifyForMore.