Is water the only substance to increase in volume when it solidifies

5 elements are known to have a lower density in their solid state than their liquid state

solid liquid melting pt
name g/mL g/mL deg C
Arsenic______4.70 ___________5.22_____…
Bismuth______9.80 __________10.07_____…
Gallium_______5.90 ___________6.09____…
Germanium____5.32 ___________5.60_____…
Silicon________2.33___________2.51____…

No, water is not the only substance that increases in volume when frozen/solidified. In fact, all liquid substances increase in volume, but I'd suggest not freezing any cooldrinks with gas, it makes a big boom when its opened. Other substances like metals and sulphur won't increase in volume since it is already in a solid state. Gasses can solidify, but you'd have to get them into a fluid before freezing them.