Injection-moulded product of bi- or multicoloured appearance, comprising: - a first thermoplastic component of a first colour that is a base colour, wherein the first thermoplastic component is pigmented with a first colour masterbatch, and - at least one second thermoplastic component of another colour that is different to the first colour, wherein the at least one second thermoplastic component is pigmented with another colour masterbatch, wherein the injection-moulded product of bi- or multicoloured appearance has at least one unmixed, especially unblended, regional domain (10, 20) of only the first or second colour, the domain (10, 20) being uncontaminated by and visually distinct from the other colour, characterized in that the first thermoplastic component and the at least one second thermoplastic component are mutually mixable, blendable and chemically compatible materials, when in their thermoplastic melted states; the first thermoplastic component is obtained from at least a base polymer selected from the group of polyethylenes, in particular of high-density polyethylenes (HDPE); and derivatives and/or compounds therof; the at least one second thermoplastic component is obtained from at least a base polymer selected from the group of polypropylenes; and derivatives and/or compounds thereof; the first thermoplastic component has a high first Melt Flow Rate / MFR, determinable according to DIN EN ISO 1133, that is in a range of 15 to 50 g/10 min, measured at 2.16 kg test load and, in the case of the group of polyethylenes, at 190°C test temperature; and the at least one second thermoplastic component has a low second Melt Flow Rate / MFR, determinable according to DIN EN ISO 1133, that is in a range of 0.5 to 5.0 g/10 min, especially of 1.5 to 2.0 g/10 min, measured at 2.16 kg test load and, in the case of the group of polypropylenes, at 230°C test temperature. - a first thermoplastic component of a first colour that is a base colour, wherein the first thermoplastic component is pigmented with a first colour masterbatch, and - at least one second thermoplastic component of another colour that is different to the first colour, wherein the at least one second thermoplastic component is pigmented with another colour masterbatch, wherein the injection-moulded product of bi- or multicoloured appearance has at least one unmixed, especially unblended, regional domain (10, 20) of only the first or second colour, the domain (10, 20) being uncontaminated by and visually distinct from the other colour, characterized in that the first thermoplastic component and the at least one second thermoplastic component are mutually mixable, blendable and chemically compatible materials, when in their thermoplastic melted states; the first thermoplastic component is obtained from at least a base polymer selected from the group of polyethylenes, in particular of high-density polyethylenes (HDPE); and derivatives and/or compounds therof; the at least one second thermoplastic component is obtained from at least a base polymer selected from the group of polypropylenes; and derivatives and/or compounds thereof; the first thermoplastic component has a high first Melt Flow Rate / MFR, determinable according to DIN EN ISO 1133, that is in a range of 15 to 50 g/10 min, measured at 2.16 kg test load and, in the case of the group of polyethylenes, at 190°C test temperature; and the at least one second thermoplastic component has a low second Melt Flow Rate / MFR, determinable according to DIN EN ISO 1133, that is in a range of 0.5 to 5.0 g/10 min, especially of 1.5 to 2.0 g/10 min, measured at 2.16 kg test load and, in the case of the group of polypropylenes, at 230°C test temperature. wherein the injection-moulded product of bi- or multicoloured appearance has at least one unmixed, especially unblended, regional domain (10, 20) of only the first or second colour, the domain (10, 20) being uncontaminated by and visually distinct from the other colour, characterized in that the first thermoplastic component and the at least one second thermoplastic component are mutually mixable, blendable and chemically compatible materials, when in their thermoplastic melted states; the first thermoplastic component is obtained from at least a base polymer selected from the group of polyethylenes, in particular of high-density polyethylenes (HDPE); and derivatives and/or compounds therof; the at least one second thermoplastic component is obtained from at least a base polymer selected from the group of polypropylenes; and derivatives and/or compounds thereof; the first thermoplastic component has a high first Melt Flow Rate / MFR, determinable according to DIN EN ISO 1133, that is in a range of 15 to 50 g/10 min, measured at 2.16 kg test load and, in the case of the group of polyethylenes, at 190°C test temperature; and the at least one second thermoplastic component has a low second Melt Flow Rate / MFR, determinable according to DIN EN ISO 1133, that is in a range of 0.5 to 5.0 g/10 min, especially of 1.5 to 2.0 g/10 min, measured at 2.16 kg test load and, in the case of the group of polypropylenes, at 230°C test temperature.