I was wondering if it’s fine if my betta fish is in a water bottle cause we were in Rhode Island and traveling back to Maine is that fine and it takes six hours

You need to give it air. You should check an actual method of transport for bettas.

If a fish has no oxygen then the same thing will happen to it that happens to a human with no oxygen. Goggle how to transport my Beta for the best method to use!

Fish use more oxygen then you may think,6 hours with that little of water wouldn't be enough oxygen in it to make the trip...I agree ask Google the best way to transport it! Have a safe trip back to Maine!!🙆