'Ptichye moloko' is chocolate sweets with a marshmellow-kind filling very popular in Ukraine. The name of the sweets could be translated as 'Birds' Milk' meaning some kind of nectar that mythologic birds are feeding on in the paradise. It is associated with ambrosia or celestial food.
You can send 'Ptichye moloko' sweets to your lovely lady as a symbol of your passion and a wish to indulge her.