The invention relates to a capsule for preparing a beverage, for example coffee, which includes a hollow element (1) for containing a product, for example ground coffee, said hollow element (1) including a side wall (4), a top surface, a bottom surface (5) and a flange (6), said flange including a deformable means (7). Said means is deformed by a deforming means (8) arranged on the capsule holder. The invention also relates to a device for using said capsule and to a method for extracting a beverage.
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