I was curious so I googled; 80 proof vodka freezes at a temperature of -24 deg Celsius. Household freezers are set to -18°C as the "ideal temperature for freezing food".
All Alcoholic beverages have a freezing point somewhere between the freezing point of water (0°C; 32°F) and the freezing point of pure ethanol (-114°C; -173°F).
Cute idea :)
MagC Boost