Mickey
A small (13 oz.) bottle of liquor, shaped to fit in a pocket, much like a hip flask. Also fits conveniently alongside the calf of a cowboy boot or rubber boot, and can be referred to as a "Boot Bottle".
Would you like to view another Canadianism? Try one of these...
Housecoat * Swish * Pencil Crayon * Bachelor * Give'em a Shout *