I hang in the sky each night with a silver glow. I pull the tides and light the dark. I wax and wane but never go. What am I

I have buttons down my front, but I am no toy. I may be short or long, stiff or soft. I can be plain or patterned, formal or casual. What am I?

I vibrantly fluff up your bags and gifts, I anchor your muscles and repair rifts, I float through the air when I catch a breeze, And stop the explosion of your sneeze.

Used to carry liquid and solid, As well as some sporting lids.

Built of twigs and tucked away, I keep small eggs safe night and day. Though I am not a house by name, for many birds I serve the same.