http://www.cbsa.gc.ca/publications/pub/bsf5056-eng.html#s2x13
Alcoholic beverages
You are allowed to import only one of the following amounts of alcohol free of duty and taxes:
- 1.5 litres (53 imperial ounces) of wine;
- a total of 1.14 litres (40 ounces) of alcoholic beverages; or
- up to a maximum of 8.5 litres of beer or ale.
Alcoholic beverages are products that exceed 0.5% alcohol by volume. Minimum ages for the importation of alcoholic beverages, as prescribed by provincial or territorial authorities, are 18 years for the provinces of Alberta, Manitoba and Quebec and 19 years for the remaining provinces and territories.