In Canada, a shot generally refers to the province's definition of a standard drink under liquor licenses. Although sizes may vary, most provinces cite amounts similar to Ontario's guidelines of 0.6 imp fl oz or 17.0 ml of pure alcohol. Since a shot is typically a spirit with 40 percent alcohol, this makes the shot 1.5 imp fl oz or 42.6 ml (though many establishments serve a standard drink of 1 oz). A double shot in North America may be either 2.5 or 3 fluid ounces.
Nevertheless, Duddy is the center of the story, and we are drawn to the challenges he must overcome and the goals he seeks to achieve. Foil-A foil is any character (usually the antagonist or an important supporting character) whose personal qualities contrast with another character (usually the protagonist). By providing this contrast, we get to know more about the other character.
In fiction, a foil is a character who contrasts with another character (usually the protagonist) in order to highlight particular qualities of the other character. In some cases, a subplot can be used as a foil to the main plot. This is especially true in the case of metafiction and the  story within a story  motif. The word foil comes from the old practice of backing gems with foil in order to make them shine more brightly.