Is there a specific name for this kind of water dispenser?

Solution 1:

I Google image searched "glass water jar with spigot", and then clicked through to view page for about 15 selected images.

Results, in order of commonality:

  • Beverage dispenser
  • Infuser jar (Indicating that there would be cut up fruit to flavour the water)
  • Spigot jar

Solution 2:

It's almost a samovar, but I think the word is usually reserved for a more specific construction.