To provide: a packaged beverage for sale in a heated state, containing an insoluble solid content and at least one cellulose-based stabilizer; the packaged beverage for sale in the heated state for which degradation in appearance quality and temperature unevenness caused during heating by a thermal insulation case is suppressed; and the manufacturing method thereof; and a method for suppressing the degradation in the appearance quality and the temperature unevenness of the packaged beverage for sale in the heated state containing the insoluble solid content and at least one cellulose-based stabilizer, caused during heating by the thermal insulation case.SOLUTION: In a manufacture of the packaged beverage for sale in the heated state containing the insoluble solid content and at least one cellulose-based stabilizer, a viscosity of the packaged beverage for sale in the heated state is adjusted to be 4.0 mPa s or higher by a method in which at least one cellulose-based stabilizer is contained in the packaged beverage for sale in the heated state, and at least one thickening polysaccharides is contained in the packaged beverage for sale in the heated state.SELECTED DRAWING: None【課題】本発明は、不溶性固形分及び少なくとも1種のセルロース系安定剤を含有する加温販売用容器詰飲料であって、保温ケースによる加温時の外観品質の劣化及び温度ムラが抑制された加温販売用容器詰飲料;及びその製造方法;並びに、不溶性固形分及び少なくとも1種のセルロース系安定剤を含有する加温販売用容器詰飲料を保温ケースで加温した際の外観品質の劣化及び温度ムラを抑制する方法;を提供することを目的とする。【解決手段】不溶性固形分及び少なくとも1種のセルロース系安定剤を含有する加温販売用容器詰飲料の製造において、少なくとも1種のセルロース系安定剤を前記加温販売用容器詰飲料に含有させること、及び、少なくとも1種の増粘多糖類を前記加温販売用容器詰飲料に含有させることを含む方法によって、前記加温販売用容器詰飲料の粘度を4.0mPa・s以上となるように調整することを特徴とする。【選択図】なし