To see a can in your dream, indicates that there is something in your past that you need to hold on to and preserve. The dream may also be a pun on how you "can" do something. Don*t underestimate your abilities and talents.
To dream of opening a can of food is a sign that you will be shamed by someone of whom you are very fond. If you cut yourself on a can, you will lose money through a bad investment.
Can — with milk - to good, profit in a family; the empty - a shortcoming.