A beverage system for selectively delivering, in a same coffee extraction device, short coffee liquid extracts and long coffee liquid extracts comprises: cartridges (2) containing ground coffee; a receiving device (10) for receiving one cartridge at a time and pumping means (73) or injecting water under pressure in the cartridge; means for opening the cartridge wherein these means comprises retaining means (21) to retain the liquid under pressure in the cartridge and engaging means (13) which engage the retaining means to open the cartridge and deliver the coffee liquid extract; ; wherein the system comprises at least a first cartridge (S) adapted to deliver a short coffee liquid extract, wherein the system comprises at least a second cartridge (L) which has substantially the same external configuration and shape as the first cartridge so as to be capable of being received in the same receiving device (10) as the first cartridge (S) and which is adapted to deliver a longer coffee liquid extract upon allowing a larger amount of water to flow there trough, wherein the second cartridge (L) for the longer coffee liquid extract is configured so that water flows through it at a higher rate than in the first cartridge (S) during extraction.