It will probably go flat faster at room temperature..!
Will A Two Liter Soft Drink Go Flat Faster At Room Temp Or Refrigerated?
I hate to do this to you my friend but I think if it is unopened [never broke seal] either place will have the same outcome, however if we are speaking of an opened then re-closed 2-liter bottle the fridge will cause it to go flat much quicker tho I am unsure as to why...hmmm...♥Nassy [I MUST RESEARCH THAT ONE...LOL]