Is drinkable onigiri drinkable?

Onigiri is a traditional Japanese food made from rice and formed into triangle or ball shapes. It is famous for various taste, and you can put ingredients you like.

Yet, how would it taste if we turn a onigiri into a drink? Some Taiwanese youtuber decided to take the challenge and give it a try! (Although the videos are main in Chinese, it is quite easy to know how they feel through their facial expression lol)