CONTAINER FOR BEVERAGE PREPARATION

The invention relates to a coffee layer structure and to containers for beverage preparation. According to one of the containers, the container comprises a compartment (91) containing ground coffee particles (1, 2) to be extracted, wherein the compartment (91) is adapted to be traversed by a flow of water under pressure from an injection wall (89) of the container towards a dispensing wall (92) of the container for preparing a beverage from the coffee particles (1, 2), wherein the coffee particles (1, 2) comprise: a first group of first coffee particles (1) having a first volume moment mean D[4,3], and a second group of second coffee particles (2) having a second volume moment mean D[4,3] and being arranged downstream of the first group of first coffee particles (1), wherein the second group of second coffee particles (2) is in direct contact with the dispensing wall (92), wherein the second volume moment mean is greater than the first volume moment mean.