I have yet to use my Camelbak, but the other night I put water/baking soda in it and let it soak all night - rinsed it out the next morning. I then set it upside to dry all day, with something holding the mouth open that wouldn't pierce the plastic to allow air to get into the pack.

3 days later it still isn't dry, and I am a little concerned about mold. Or should I be? What is the best way to make sure that it dries out? Of course I did not try to take the liner out...