Easy clean riddles for teens with simple answers

What kind of cup doesn't hold water?

You always carry me in your hand, always with you, from your birth till your death! I am a fruit. What Am I?

What comes down but never goes up?

I always come down and never ever go up? Think, think and think! We all just love it.

I know a word which reads the same when written forward, backward or upside down. Do you?