upright-floating tea stalk (lucky omen)
A tea stalk that floats vertically in one's cup, traditionally considered a sign of good luck.
A tea stalk was floating upright in my tea today.
They say that when a tea stalk stands upright, something good will happen.
Compound of 茶 (cha, 'tea') and 柱 (hashira, 'pillar'), referring to a tea stalk standing upright like a pillar.