Though Cola is the known drink used to power franky himself and his body it is shown that other drinks can also affect his personality. Used as a trope by Chopper in Enies Lobby, it was used as a plot point in his stay in the Future(?) Kingdom where he becomes gentleman like when tea is used. And reverts when it fizzes.
From the wiki
It was shown during Franky's fight with Fukuro that depending on what kind of drink Franky has, it can change his hair style and attitude when Chopper accidentally hands him vegetable juice and tea. It also shows that Franky's strength is many times greater when he has more bottles of cola in his stomach fridge, and he needs it as a fuel for certain attacks. His hair acts as a kind of meter to the amount of cola in his stomach, being tall if he is full and sagging if empty. Franky's stomach compartment can hold up to three bottles, or six liters, of cola.
So Canonically only three drinks are known through which Franky's personality alters viz. Vegetable Juice and two kinds of tea.