This is one of the small gestures that make me fly CX F with my wife. Cannot say that we are "frequent" flyers but take around 4 CX F flights together per year. Once was our wedding anniversary, once her birthday (actually day before). Without asking once we got a chocolate box and once a champagne bottle (alas not Krug, but Deutz from Biz class).I dont expect (and will not expect) such gestures, but they are very pleasing.

Once got a bottle of Dom on SQ F, but they realize that we were in transit in SIN and had to take it back as we could not get it through security. Too bad.