Can a person pour wine from one container to another container using a funnel for liquids on Shabbos?
It is permitted.
The only issue that might potentially be is making an ohel, however with a regular bottle the mouth of the bottle is not very wide and would not an issue. Even if it would be very wide, the funnel would have to cover the whole top of the container, something that is not common at all. O:CH 315-13, M:B 48, 49.