I measure large amounts of fluid such as water or milk. What am I called?

I am used used to cut fat into flour when making pastries, what am I called?

I add air to ingredients to make them light and fluffy, what am I?

You place hot foods on me when they come out of the oven, I allow air to circulate around foods and cool the them down, what am I?

I can be used to bake sheet cakes, frozen foods, or roast vegetables. What am I?