A can for extemporaneous preparation of beverages by extraction andor infusion including a first chamber configured to collect a final beverage, a second chamber containing a drinkable liquid, and a filtering device containing a substance to produce the required beverage by extraction andor infusion. The buffer layer extends across less than an entire bottom surface of the semiconductor chip. The sensing window of the memory cell can be greatly improved by this read operation. The user management unit 35 manages the information for identifying the user, and an account number of the user in the payment institution encrypted with a public key of a settlement processing apparatus.