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.
1 Cans have the highest recycling rate of any beverage container in the U.S., far higher than glass and plastic.  The average aluminum can is made from 68 percent total recycled content, the highest of any beverage container.