Alum 
To see alum in your dream implies that you are upset by your inability to attain your goals.
To dream that you taste alum indicates that you are apologetic for a wrong doing you have committed towards someone undeserving of such harsh treatment.
Aluminum
To see aluminum in your dream indicates that you are satisfied with the amount of prosperity you hold in your life, no matter if it is less than what others have been able to attain. You are successful at holding close what you consider important and significant to you.
Cans
Dreaming of a can indicates a store of possibilities that will provide emotional fulfillment long into the future. There may be many things that you desire to experience or participate in and dreaming of cans suggests that you may in fact get to experience most of what you desire throughout your life. Note the label on the can or cans for further insight into your unconscious.
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