Whiter than white (actually "white wine" golden) yet mysterious. As for the taste, white wine acidity balances rich elderflower with spirituous lacing...
I added a generous squeeze (~1/3 oz-ish) lemon juice and a single grate of lemon rind in place of the lime twist for some brightness as mine was a bit 'heavy' despite the dryness of the calvados, but that could have been due to my brand of liquors. Very sippable. Can see the shake being beneficial (I shook!)
I used a 12 yr old Calvados Pays D'Auge and an Austrian natural white wine wabi-sabi white solera