where I can buy stainless steel Flask gift set with engraving "Canada" or something like this in Toronto area?

Answer 1

Check mens department of a department store. May department stores also have engraving services that might have flasks. Most jewelers carry them.

Answer 2

Check out the Eaton Centre
most Malls have a service like this and they usually sell this stuff too
I know in Mississauga at Square One, they have one.

Hope this helps!