What is the adult baby diaper that holds the most liquid in size extra large?

If you mean "what is the adult diaper that

holds the most liquid in size extra large", that would be the Dry

24/7 Maximum Absorbency.

If you type "XP Medical Adult Diaper Review

and Testing" into your favorite search engine you will find adult

diaper testing from a company that sells all different diaper

brands (so it's more impartial). It included the quantity the adult

diapers can hold.