To heat easily a heating drink-container and make no trash, for example, a heating-element which is disposed of after use, by bringing a plastic package body into close contact with the whole or part of the body wall of a container main body, thereby packaging the container main body liquid-tightly.

An infant-feeding container 1 comprises a container main body 3, formula water 2-stored in the container main body 3, and a package body 20. In the container main body 3, the amount of formula water 2 after the deduction of an amount of milk to be dissolved is stored. On the fitting mouth 4 of the container main body 3, a dummy cap 9 or an artificial teat is fitted via ring-shaped cap 8. First, hot water is filled into a stainless-made thermos bottle, the infant-feeding container 1 is immersed in it and kept warm, and it is used after the removal of the package body 20 when needed. In the case, because the infant-feeding container 1 is liquid-tightly packaged in the package body 20, the mouth of the infant-feeding container 1 is prevented from getting wet and soiled with the hot water and so on, therefore an opening from which the contents are drunk is kept clean.