Answer:
I run cold and hot, I look blue but am red. What am I?
They are the shore's gallant knights.
What must you give before you can keep it?
Mostly worn by women or girls, this is sometimes shiny like silver or gold, and sometimes it is made of pearls.
I'm often served as a "rack of ..." I'm often smoked or grilled, with bones in, and slathered in BBQ sauce.
I will disappear every time you say my name.