I get smaller every time I take a bath. What am I?

You should keep me on, or you may get no service. You can be a stuffed one, though that is not nice. If you are in need, I may give you the one off my back.

I used to be the king of culinary convenience, a revolutionary design. But now those silly air fryers have come for what is mine!

I am white and sweet, a baker's delight, but devour too much and your teeth feel the bite.

Despite it's name, it's actually heavier than a regular house.