BTP SCAVENGER HUNT!!!

You've come so far and yet have more to go. Click on the BTP author's names to collect more riddle answers. Once you have all 11 answers collected email btpcontests@gmail.com. Three lucky winners will be chosen at random to receive a $10 BTP gift certificate. Contest closes at 12 am 12.22.12.

My riddle!

When I am filled,

I can point the way;

When I am empty,

Nothing moves me.

I have two skins,

One without and one within.

What am I?

Riddlers: 

Serenity

Drea

Nevea

Shirelle 

Shanayah

Billy 

Naomi 

   Janet 
   Gynger
   Raelynn

READY! SET! GO!