A container for a beverage or foodstuff preparation machine, the container for containing beverage or foodstuff material and comprising a code encoding preparation information, the code comprising a reference portion and a data portion: the reference portion comprising reference units defining a reference line r; the data portion comprising a data unit, wherein said data unit is arranged on an encoding line D that intersects the reference line r, the data unit is arranged a distance d from said intersection as a variable to at least partially encode a parameter of the preparation information, whereby said encoding line D is circular and is arranged with a tangent thereto orthogonal the reference line r at said intersection point, wherein the reference units are arranged with a configuration defining a reference point from which the reference line r extends.