Summit cola
From KGB Wiki
Summit Cola is a soft drink sold exclusively at Aldi. It used to cost only $0.69 for a standard 2L bottle (notably, this was "cheaper than water"), and it is incredibly mediocre carbonated sugar-water. During his Second-Vice-Presidency, Spalsen introduced the drink to the organization, threatening to repurchase the drink on several occasions.
Unfortunately, inflation has increased the price of the cola to a price higher than water. Or perhaps this is fortunate, as it may discourage future 2VPs from buying the cola over water.