Liquid that doesn't freeze are helium as well as alcohol and very sugary drinks and sugary liquids.
Alcohol and very sugary drinks or very sugary liquids won't freeze in normal freezing conditions unless it gets really low below freezing.
Some people even mix a bit of cranberry juice in their water bottles such as when going cross country skiing or being out in really cold temperatures.
The cranberry juice is also healthy for you as well as the water.
Helium is the only substance that remains a liquid at normal atmospheric pressure even down to absolute zero 0 Kelvin or -273.15 C.
Helium can be solidified under extreme pressure.
Helium has extremely weak interatomic forces, which means that the attraction between helium's atoms is minimal.
And at very low temperatures, the tendency for the molecules to arrange themselves in a crystalline structure "minimizing energy" is overcome by the tendency of the liquid to maximize entropy disorder.
And at extremely low temperatures, the liquid helium will transition into a superfluid state and exhibit unique properties such as zero viscosity and an ability to flow without friction.
Even other liquids can be supercooled, which means that the liquids can be cooled below their freezing point without it solidifying, although the liquids will still also freeze eventually if the temperature is low enough or a nucleation site is introduced.
Examples of this are water and even certain types of antifreeze.