Carbon Fizz

-Originally created in the future to be a salesbot that could create and store cold drinks within his body to sell to thirsty patrons (a fairly common marketing tactic in that era)

-At one point he stumbled into a time/space portal and wound up in the past. More specifically, in a time/space bubble in the 2000's that was actually the 1800's within the bubble. 

-Because of time-space shennanigans and falling into a time before his kind were built, he suffered damage and deterioration that could not be repaired. He thought he was doomed to wander this desert town until he eventually fell apart, a pile of rusted scrap, when he stumbled into yet another space/time portal and found himself not only back in his original time, but also completely healed and clean again. 

-Now he can travel between times and he has a bit more control over it, although it's still at random. If he needs to, he can look for Matteo's bar and use that place to travel to the right time. 

-When in the future, he has his shiny new look, when in the past, he is rusted and broken.  (Soda is cool and refreshing in the future, but in the past it is warm and more like a thick syrup that leaks from cracks in his tail)

-Surprisingly calm and collected for a time-traveling bot. He's quite charismatic, as per his programming, and always willing to strike up a conversation. 

-He's so used to the time-traveling that he basically just lives two lives, and just accepts whenever he randomly travels.