I spilled an entire mug of tea on my X1E when it was just new. That would have killed any Macbook, but the Thinkpad was fine. Turned it off, unplugged the power, let it drain through the bottom. Next morning, open it up, clean it out, turn it on, and it's fine.
Even had time to make a photo: https://www.reddit.com/r/thinkpad/comments/h0663l/good_thing...
Don't count on this too strongly though; not every Thinkpad is spill-resistant, unfortunately.