A packaged beverage with a green tea extract mixed therein, comprising the following ingredients (A), (B) and (C): (A) from 0.01 to 1.0 wt% of non-polymer catechins, (B) oxalic acid or a salt thereof, and (C) caffeine, wherein a content weight ratio [(B) / (A)] of said oxalic acid or salt thereof (B) to saidnon-polymer catechins (A) is from 0.00005 to 0.1, and a content weight ratio [(A) / (C)] of said non-polymer catechins (A) to said caffeine (C) is from 5 to 10000. The packaged beverage containscatechins at high concentration, is reduced in bitterness and astringency and is suited for long-term drinking, is excellent in the stability of bitterness and astringency and also in the feeling as it passes down the throat, and further, remains stable in its color tone even when filled in a clear container and stored at high temperatures.녹차 추출물을 배합한 용기 포장 음료로서, 다음 성분 (A), (B) 및 (C),(A) 비중합체 카테킨류 0.01~1.0중량%,(B) 옥살산 또는 그 염(C) 카페인을 함유하고, (B)옥살산, 또는 그 염과 (A)비중합체 카테킨류의 함유 중량비[(B)/(A)]가 0.00005~0.1이고, 또한 (A)비중합체 카테킨류와 (C)카페인의 함유 중량비[(A)/(C)]가 5~10000인 용기 포장 음료.고농도의 카테킨류를 함유하고, 쓴 맛, 떫은 맛이 저감되어 장기간의 음용에 적합하고, 또한 쓴 맛, 떫은 맛의 안정성 및 목 넘김이 뛰어나며, 또한 투명 용기에 충전해 고온 보존해도 장기간 색조가 안정적이다.
