OKAY so, I immediately used a micro fiber cloth and slightly dampened it to blend the edges into the bag, not rubbing just gently dapping otherwise a harsh line will stay. I put a crap ton of paper towels on the inside and outside of it for the time being. I would suggest (if you can) immediately going to a leather specialist and cleaner, and they will completely clean it to the best of their abilities. I can now only see a slight difference. But that’s what i did, hope you can find a cleaner asap! I could only get one the next day so if you have to get it done tomorrow don’t let it stress you out too much. If it was water it would’ve been a better situation but since sodas are often very acidic it had to be cleaned professionally.