It was sometimes very cold in Hanoi at the night in March. When I went to a beer hall, I found other customers drinking this kind of drink in a coconut. So, I ordered it, too. It contained more alcohol than beer. The hot drink in a coconut warmed my body up. I did not know how to make it well but I suppose the coconut might be used as a container of drink and be heated by steam.
27 March 2005
Guidebook for Vietnam:
地球の歩き方 ベトナム 2005～2006年版
Lonely Planet Vietnam, 8th ed.
Lonely Planet World Food Vietnam
Lonely Planet Vietnamese Phrasebook