A CPU cache is a hardware cache used by the central processing unit (CPU) of a computer to reduce the average cost (time or energy) to access data from the main memory. A cache is a smaller, faster memory, closer to a processor core, which stores copies of the data from frequently used main memory locations.
It takes approximately 31 empty aluminum cans to equal 1 pound. As of 2014, the average weight of an empty aluminum can is 14.9 grams.
It takes 31.92 empty cans to make a pound. I got 29.09 cans per 16 ounces (1 pound) at .55 ounces per can. But, all and all, if you remember 30 empty cans per pound you will be good to go.