In imaginary world, the sun is always shining, a glass is half-full and ink in a cartridge never comes out. In our world, HP has recently managed to arrange the last one, but in a specific way. The new technology allows “smart cartridges” with newly designed chips to send a request to HP when the ink is running low, and the company will automatically send a new XL ink cartridge to the user. There are different variants of request-sending conditions, utterly convenient and specific to each user. They are based on the information about monthly print volumes and can be changed in any time. In this case, a user gets bigger-than-usual-sized cartridge right to his home or office on lower than retail price right when it needed (plus a return envelope for recycling used cartridges).