杯
ハイ, さかずき
counter for cupfuls, wine glass, glass, toast
JLPT3 G7 S8 F1235
As per 不# (bulge) + 木 tree/wood → bulging wooden bowl (for soup/drinks) → *goblet*; *wineglass*; *sake cup* → *counter* (for cupsful). Also, *trophy* (← valuable goblet etc. given as a prize).
[Full Kanji Etymology List]