Provided is a non-tea-based, packaged beverage which includes a sour
seasoning, contains catechins at
high concentration, and even after stored over along term, can still give a refreshing feeling specific to a
sour taste. The non-tea-based, packaged beverage is free of the persistence of a
sour taste, which is experienced when taken in sport scenes, and is excellent in mouth refreshment. Even in a form filled in an
oxygen-permeable, clear container, the non-tea-based, packaged beverage shows excellent
color tone stability. The non-tea-based, packaged beverage contains a purified product of
green tea extract added to it. The purified product comprises non-
polymer catechins in its
solid constituents and has a content weight ratio of (B)
oxalic acid to (A) the non-
polymer catechins [(B) / (A)] in a range of from 0 to 0.002. The non-tea-based, packaged beverage comprises the following ingredients (A) to (D): (A) from 0.03 to 0.6 wt % of non-
polymer catechins, (B)
oxalic acid or a salt thereof at an ingredient (B) / ingredient (A) of from 0 to 0.02, (C)
caffeine at an ingredient (C) / ingredient (A) weight ratio of from 0 to 0.16, and (D) from 0.03 to 1.0 wt % of a sour
seasoning, and has a pH of from 2 to 6.