A system for preparing a predetermined amount of beverage suitable for consumption, provided with an exchangeable holder (102), and an apparatus provided with a fluid dispensing device which is detachably connected to the holder for dispensing a first fluid under pressure to a first mixing chamber (110) of the exchangeable holder. The exchangeable holder is provided with a storage space (108) which is filled with a second fluid and a fluid communication (114) between the storage space and the first mixing chamber for dispensing the second fluid to the first mixing chamber. The holder further comprises a fluid communication seal (138) for bringing the fluid communication into operation through removal of the sealing action of the fluid communication. The fluid communication is a channel having a first curvature (171) in longitudinal direction of the channel.