Why pyrex plates

Newbie here getting ready for my first run. What so special about pyrex dishes??

My understanding, once you've collected everything from your bags you wanna put it on a collection screen (25m) sitting on either a towel, paper towel or pyrex dish.

The towels/paper towel makes sense to me since the 25m screen will let whatever water out and get soaked by the towel. But won't the water just kinda sit on the pyrex? Am I misreading something?

Any tips are welcome 😁