Hi just out of interest. I accidentally froze 2 cans of lager. When I remembered they were in the fridge I got them out, they felt heavier, so I decided to weigh them. I compared this to two unfrozen cans of the same brand. The frozen was heavier. I know that the mass can't of changed? So how can two frozen larger cans weigh more than two room temperature ones? I assume the can is aluminum.