System of a package containing a product and an apparatus using said product, the apparatus being refilled by the product contained in the package, wherein a code related to the contained product is associated to the package, said code being a two dimension code and said code presenting a predetermined surface S code, and wherein the apparatus comprises a code reader to read the code associated to the package, said code reader being an image capturing device, said image capturing device being defined by: - a predetermined focal range, - a horizontal angle of view α and a vertical angle of view β, wherein the apparatus comprises a housing structure and a cavity inside the housing structure, characterized in that said cavity extends from a back side at the inside of the housing structure to a front side having a hole at an external surface of the housing and comprises at least one lateral wall extending between the back side and the front side of the cavity, wherein the image capturing device is positioned at the back side of the cavity and the optical axis of the image capturing device extends in direction of the middle of the front side of the cavity, wherein the hole of the front side of the cavity presents a surface S hole such that: 1,2 S code ≤ S hole ≤ 6 S code wherein the distance extending between the back side of the cavity and the front side of the cavity is comprised in the focal range of the image capturing device, and wherein the at least one lateral wall of the cavity is configured to surround the horizontal angle of view α and the vertical angle of view β of the image capturing device, and wherein the hole in the external surface of the housing structure is empty. wherein a code related to the contained product is associated to the package, said code being a two dimension code and said code presenting a predetermined surface S code, and wherein the apparatus comprises a code reader to read the code associated to the package, said code reader being an image capturing device, said image capturing device being defined by: - a predetermined focal range, - a horizontal angle of view α and a vertical angle of view β, - a predetermined focal range, - a horizontal angle of view α and a vertical angle of view β, wherein the apparatus comprises a housing structure and a cavity inside the housing structure, characterized in that said cavity extends from a back side at the inside of the housing structure to a front side having a hole at an external surface of the housing and comprises at least one lateral wall extending between the back side and the front side of the cavity, wherein the image capturing device is positioned at the back side of the cavity and the optical axis of the image capturing device extends in direction of the middle of the front side of the cavity, wherein the hole of the front side of the cavity presents a surface S hole such that: 1,2 S code ≤ S hole ≤ 6 S code wherein the distance extending between the back side of the cavity and the front side of the cavity is comprised in the focal range of the image capturing device, and wherein the at least one lateral wall of the cavity is configured to surround the horizontal angle of view α and the vertical angle of view β of the image capturing device, and wherein the hole in the external surface of the housing structure is empty.