一ひと粒つぶで二に度どおいしい

expression

two pleasures from one thing; double enjoyment

A set phrase originating from a TV commercial for a candy with two flavors. Used figuratively to describe any situation where one action or item yields two benefits or pleasures.

• このスマホはカメラも高こう性せい能のうで、一ひと粒つぶで二に度どおいしい買かい物ものだった。

  This smartphone also has a great camera, so it was a purchase that gave me two pleasures in one.

• 散さん歩ぽがてら買かい物ものに行いけば、一ひと粒つぶで二に度どおいしいよ。

  If you go shopping while taking a walk, you get two benefits for the price of one.