Drinks (specifically, soda) related things?

Is it just me, or is there no basic soda option out of all the drinks stalls? Vending machines would be a good generic option, to quench thirst.

If soda comes from a fountain and not a vending machine, then a souvenir cup that grants free refills for the visit would be nice too. Potential extra profit margin in the game, and cuts down on litter.