https://www.cbsa-asfc.gc.ca/travel-voyage/bgb-rmf-eng.html
You must meet the minimum age of the province or territory where you enter Canada. Minimum ages are established by provincial or territorial authorities: 18 years for Alberta, Manitoba and Quebec and 19 years for the remaining provinces and territories.
The CBSA classifies "cooler" products according to the alcoholic beverage they contain. For example, beer coolers are considered to be beer and wine coolers are considered to be wine.