Back in the days, singapore airlines had these in the amenities draw. instantly recognising the brand usually associated with nail clippers, i emptied out the aircraft of razor blades for my extended trips overseas. (this was long before i even learnt about shaving, infact i learnt to shave with those Kai disposables).
the stewardess was also happy to give me a whole box of them when asked. these days, it seems that singapore airlines no longer have these in their amenities box, and if they do have razors its usually one of crap quality.
Currently own: Feather DX teak scales; Gillette Fatboy;Tech 40 Aluminium; Tech 50 Ball end