Flexible package for food or beverage preparation having a rigid part

A flexible or semi-flexible closed package for containing an ingredient for preparing an edible product in a food or beverage preparation machine by mixing the ingredient with a mixing fluid injected in the flexible or semi-flexible closed package by the food or beverage preparation machine, the flexible or semi-flexible closed package comprising:

• (i) a plurality of flexible or semi-flexible lateral walls that form a flattened package body, and
• (ii) a cup-shaped bottom portion adapted for insertion of a fluid injection element of the food or beverage preparation machine,
• the flattened package body and the cup-shaped bottom portion being formed from a one-piece elongated primary flat blank sheet made of flexible material folded in a U-shape around a transversal symmetry axis and sealed along lateral and upper edges, wherein the cup-shaped bottom portion is a hollow volume having a concave lower side and convex lateral sides, a profile curvature of the concave lower side being identical to a profile curvature of each of the lateral sides, the one-piece elongated primary flat blank sheet comprising a primary hole that is punched through a thickness of the one-piece elongated primary flat blank sheet, the primary hole being located on the concave lower side of the cup-shaped bottom portion, and wherein the flexible or semi-flexible closed package further comprises:
• a secondary thickness reinforcement sheet located at least on an inner surface of the cup-shaped bottom portion of the flexible or semi-flexible closed package, the secondary thickness reinforcement sheet comprising a secondary hole, and
• a tertiary thin sheet sandwiched between the flexible or semi-flexible lateral walls of the flexible or semi-flexible closed package and the secondary thickness reinforcement sheet.