Abstract: A seamless, tubular food casing produced by extrusion or coextrusion, wherein at least one layer of the casing comprises a mixture of: a) thermoplastic starch and/or a thermoplastic starch derivative and b) at least one further polymer, in which the further polymer is a homopolymer or copolymer comprising at least one selected from the group consisting of hydroxycarboxylic acid units, a poly(ester urethane), a poly(ether urethane), a poly(ester ether urethane) and a poly(alkylene carbonate) of the formula —[CHR1—CHR2—O—CO—O—]n, where R1 and R2 independently of one another are a hydrogen atom or a (C1-C4)alkyl group and n is an integer from 10 to 5000, and wherein the casing carries internally at least one transferable coloring, aroma substance and/or flavoring.