wine cup
醆 centers on a vessel for drinking wine: a wine cup or sake cup. The meaning is specific to the object itself.
醆 combines 酉 (wine vessel) with 戔, which likely contributes the sound. The character is used for a specific type of wine cup.
The left side 酉 is a wine jar, and the right side 戔 looks like a small cup with a lid. Together they make a wine cup.
For サン, imagine the sun (サン) shining on a wine cup, making the wine sparkle: sun -> サン.