Water-soluble unit dose article comprising a water-soluble film comprising a polyvinyl alcohol polymer comprising an anionic monomer unit

A multicompartment water-soluble unit dose article comprising a treatment composition and comprising a single water-soluble film,

• wherein the single water-soluble film comprises a first polyvinyl alcohol copolymer wherein said first polyvinyl alcohol copolymer comprises a first anionic monomer unit, a vinyl alcohol monomer unit, and a vinyl acetate monomer unit, wherein said anionic monomer unit comprises an anionic moiety, and
• wherein the single water-soluble film is folded upon itself to create at least a first film layer, a second film layer and a third film layer;
• and
• wherein at least a first internal compartment and a second internal compartment are formed between said layers;
• and
• wherein the multicompartment water-soluble unit dose article comprises at least one seal region in which the first film layer, the second film layer and the third film layer are all sealed to one another, and
• wherein the first internal compartment is positioned above the second internal compartment in a superposed orientation and the first internal compartment and second internal compartment are separated from one another by at least one water-soluble film layer,
• wherein at least one of the first and/or second internal compartments comprises a treatment composition selected from laundry treatment composition, dishwashing composition, hard surface treatment composition, or a mixture thereof.