Liquid treatment cartridge, set of such cartridges and method of manufacturing it

[0129] The liquid handling core as described below comprises a housing comprising a container in the form of a beaker-shaped housing part 1 ( Figure 1-3 , Figure 22 , Figure 36-39 ). The beaker-shaped housing part 1 is elongated in shape. The central axis 2 (in this example the longitudinal axis 2 ( figure 2 , image 3 )) form the reference axis. The beaker-shaped housing part 1 is closed at one axial end and open at the opposite axial end. The beaker-shaped housing part 1 is substantially cylindrical along most of its length. The closed axial end is rounded to withstand the pressure of the liquid in the beaker-shaped housing part 1 during use. The beaker-shaped housing part 1 can be made of metal such as aluminum or plastic such as polypropylene. The open end of the beaker-shaped housing part 1 is closed by and irreversibly bonded to the hat-shaped housing part.

[0130] The first hat-shaped housing part 3 ( Figure 3-21 ) comprises a main body 4, which can be obta