"It tastes better than it sounds" he adds helpfully after the fact.

He did see the apprehension, because Guts was also not entirely convinced by bean tea when he first heard about it either. But hey, they don't have any proper drinks, so he'll take it.

Anyway, he's done his good deed for the day, so he turns around to let the guy enjoy his newfound bean juice experience. Guts will be over here, at a table, sipping on his soup.