System for preparing a beverage

A system for preparing a quantity of beverage suitable for consumption, the system comprising:

• a first exchangeable capsule and a second exchangeable capsule, the second exchangeable capsule being larger than the first exchangeable capsule, and
• an apparatus including a first brew chamber part and a second brew chamber part forming a brew chamber for closing around one of the first exchangeable capsule and the second exchangeable capsule while preparing the quantity of the beverage, and
• a fluid dispensing device for supplying an amount of fluid under pressure to the first brew chamber part,
• wherein the first brew chamber part includes a cavity for receiving the first or second exchangeable capsule,
• wherein an outer part of the second exchangeable capsule comprises a cup-shaped body, a lid and a flange, wherein the cup-shaped body comprises a bottom and an outer circumferential wall of the second exchangeable capsule,
• wherein the first brew chamber part and the second exchangeable capsule are adapted to each other such that the outer circumferential wall of the second exchangeable capsule engages at least a part of an inner circumferential wall of the first brew chamber part when loading the second exchangeable capsule into the first brew chamber part.