Which ThinkPads have the water-spill resistance feature (drain holes)?

[Pan-optical]

I am trying to get an overview when it stated and if it ended somehow?

600X and T23 have no dedicated drain holes as far as I can see.

T43p has an unlabeled empty hole, it could be for drainage.

T60 & T410 have drain holes at the underside labeled as such.

T430s has unlabeled holes, reported as working drainage.
https://forums.lenovo.com/t5/ThinkPad-T ... d-p/770551

According to Lenovo the T440 still has it, still with the T480?
https://www.youtube.com/watch?v=0U5n2WaMMHo

[Pan-optical]

Additional info I found:

Some newer models might not have holes but are 'sealed' instead like the X240 (see how the coffee doesn't flow through)? https://www.youtube.com/watch?v=tOFvk-FzTxQ

There is also a thread with conflicting info:
https://www.reddit.com/r/thinkpad/comme ... ard_water/
T480 might still have drain holes, but not T480s.