Beverage or foodstuff container and preparation system

A container for use with a machine for preparing a beverage and/or foodstuff or a precursor thereof, the container including: a storage portion for containing a precursor material, a closing member to close the storage portion and an annular flange-like rim comprising an annular force ring made of a wood pulp-based material, wherein the annular force ring is of essentially S-shaped when seen in transversal cross-section. A set of different containers is also proposed as well as a container system and a system comprising a container and a beverage preparation machine.