Sake

Sake (pronounce Sah-kay) is a Japanese word which translates to "alcoholic beverage". It has come to refer to a drink brewed from rice and references to it can be found in animes and manga throughout.

One Piece
Sake is found commonly throughout the series, though other drinks such as beer and rum can be found in the series. The first reference to drinking sake came from Shanks in chapter 1 (anime episode 4) and Higuma's inccident at Patty's Bar in Luffy's hometown.

According to Shanks he has travelled the world and thinks his hometown in the West Blue makes the best sake in the world.