Here's what you can do. There are third party Mac repair shops that are still around. They have certified Apple technicians working for them, at most shops. There really good technicians, sometimes better then the ones at the Apple store
sometimes.
You can go into them and say hey I'd like to talk to, IDK the service manager, or maybe the store manager. So you say hey, you know last night I spilled water in my Mac and I'm worried that I might have damaged it. I'd like to know what you charge to open it, inspect it and clean it.
Sometimes you didn't do any damage and it needs to be cleaned and dried, and it will work just fine. The shop may not have to report it, and you may, just possibly be okay.
Now then this is never 100%, sometimes the water gets in there and damages something. Sometimes months to a year later something happens and you take it to Apple and they say, "My Computer is broken and I would like you to fix it under Applecare." The tech goes to look at it and he says something like," Aha!, they got this wet, and I can tell they got this wet, so you are no longer covered by Applecare on this machine."
Then they type that in their data base and hit save and you're screwed permanently on that machine.
Honest story. I open a iBook years ago. I find milk,
I so hope it was milk. I call the customer and say ,"Sorry this isn't covered by Applecare, and, here's the estimate to repair it." Then I'm told that there's no way milk could have gotten in there(
, oh I hope its milk). I get into an argument with this person etc etc........... Long story short, liquid spills are liquid spills, they void the warranty period, and you can tell years later too if you know what to look for.