YSK that if you’re out with people and don’t want to drink for any reason; having a non-alcoholic drink (anything really) in your hand can help you feel at ease and signal others you don’t need a drink.
from /r/YouShouldKnow
YSK認爲，如果你和人們在一起，並且因爲任何原因不想喝酒；手裏拿着不含酒精的飲料（真的是任何東西）可以幫助你感到安心，並向其他人發出你不需要喝酒的信號。