I have no voice, yet I prevent you from cracking, I have no legs, yet I travel all over your body. The colder it gets, the more you need me, The more you use, the softer you become. What am I?

You can find me in abundance both where water is plentiful and where it is sparse. If you find me in your eye, you'll undoubtedly cry. My descent marks the passage of time. What am I?

I hold your secrets, your lunch, and your gear, I sit on your shoulders when school days are near. With two trusty straps and a zipper to close, I travel wherever your daily path goes.

I have control issues. Get out of the way, you're blocking the sensor. There's another one just for the volume? You lose your mind if you can't find me, I'm probably buried in the couch. What am I?

I sit atop a bottle's head, Or shield your eyes where light is shed. I am the limit on a prize, And where the mushroom meets the skies. I seal a tube, I crown a tooth, And in slang terms, I mean untruth. What am I?