The Complete Guide to Interpreting Your Dreams

by Stearn Robinson - Tom Corbett
The significance depends on the details and the action.

If the dream involved many cans and they were full, you can expect some good news to reach you quite soon.

If you opened a full can» you will discover some very useful secret knowledge; if you drank from a can, you will have unanticipated joy; however, if the can featured in your dream was empty, discarded, or you threw it away or cut yourself on it, you may have serious financial difficulties ahead.

Reexamine your plans for an alternate road.

My Dream Interpretation

by myjellybean
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 an empty can suggests that you are contemplating some venture or activity which would turn out to be disappointing and a waste of effort. Don’t try anything unfamiliar for a while after you have this dream.

Complete Dictionary of Dreams

by Dr. Mıchael Lennox
A can contains something of value that you want to keep preserved for later use, usually food.

The implication of this symbol is that something from the past has been stored and saved. This can be something of value, in which case it is a positive dream image. However, canned goods can spoil and become dangerous, in which case the can in your dreams could indicate it is time to let go of something from your past.