Some details on Cory Booker's speech, as I understand them

[Wiz Imp]

3. Unclear exactly how that is being handled but From the NPR article

The longest filibuster on record was a 1957 speech by then-Democratic Sen. Strom Thurmond of South Carolina — in opposition to the Civil Rights Act — that lasted for 24 hours and 18 minutes.

Media reported at the time that Thurmond sustained himself with "diced pumpernickel and bits of cooked hamburger" and sips of orange juice. His aides set up a bucket in the cloakroom so he could keep a foot on the Senate floor if he needed to relieve himself.