Opening device for a package and package having an opening device

Opening device for a package having a designated pour opening covered with a separation membrane and filled with a pourable product;

• the opening device comprising at least:
• a collar having a central axis and delimiting a flow channel extending between an inlet opening of the collar configured to allow entry of the pourable product into the flow channel and a pouring outlet of the collar configured to allow exit of the pourable product from the flow channel;
• and
• a cutter configured to break the separation membrane and being at least partially arranged within the flow channel;
• the collar comprising an inner surface facing the flow channel;
• the opening device further comprising a retaining device configured to block movement of the cutter out of the flow channel and through the pouring outlet by inducing a rotation of the cutter about a rotation axis transversal to the central axis;
• the retaining device comprising a retaining element protruding from the inner surface of the collar and an interaction element connected to the cutter;
• and
• the retaining element and the interaction element being configured to interact with one another so as to induce the rotation of the cutter about the rotation axis.