Riddle me this.

[Neoswayne]

This is the place to post your riddles and see if people can solve them, so give it your best shot. I am just doing something we did in Brit Lit on this forum.

[Neoswayne]

I hang on for life
I live in the pitch
I should not be taken
I may Join with my brother,
we're formed from the same
I grow slower than you
I am older too
I give new meaning to water of life.

What am I?

[Kevino]

Welches 100% Grape Pudding

[Kevino]

I'm something.
The maker doesn't want it.
The buyer doesn't need it.
and the user doesn't know it.
what it is?