The first libation that comes to mind that has intenational recognition is, without a doubt, our icewines. Consistently cold winters, strict regulations, and quality grapes such as Riesling or Vidal make the icewines of BC and Ontario our "signature wine." Amazing as these wines are, how many of us as Canadians have icewine on a regular basis? Furthermore, dry table wines from Chardonnay to Shiraz have won international competitions, but we've yet to highlight a single varietal as our "national wine."
Speaking of regionality, the choice of favoured spirit also changes from province to province. The vast fields of the Prairies make rye whiskies the prerred drink in Alberta and Saskatchewan. On the other hand, trade routes dating back centuries have resulted in rum being the top spirit in Newfoundland.