Provided is a package that has a bag body, at least one mouth part member bonded to the bag body, and a contained product which is a liquid housed in the bag body, the package being characterized in that: the bag body of the package is formed in a bag shape by using, as a material, laminates each having a sealant layer and a water vapor barrier layer composed at least of a fluorine-based resin, and by bonding together the sealant layers opposing each other so that the sealant layers are to be located on the inside of the bag body； the mouth part member is sandwiched between the oppositely facing sealant layers and is bonded thereto； the volume V of the contained product housed in the bag body is 0.1-20 cm3； and the relation between the area S (cm2) where the bag body is in contact with the contained product housed in the bag body and the aforementioned volume V (cm3) satisfies 0.05≤V/S≤0.25 (formula (I)).
