Thanks everybody for your help. Appreciated.
Ali,
I got this "bonus" nep as a nep seedling inside a pot of nep I bought in Thailand. Found this "hitch hiker" when I'm repotting...
There's another possibility that it might be a
N. mirabilis x xcoccinea because I have seen this hybrid widely available in Thailand plus the fact that this nep has thin paperly leaves like
N. mirabilis. I believe if this hybrid involve
N. rafflesiana (plus the
raff in
x coccinea) , it's should have more traits from
N. rafflesiana like pitcher shape and thicker leaves.
I will update this thread when this nep is more mature and making uppers. Thanks again.