Oh, also, @ksosna, I highly recommend using Nuun tablets for your electrolyte and hydration intake (still using water as your primary hydration source, of course). I use these on all of my excursions and have yet to find a product I like better. REI sells a 16-oz Nalgene bottle which is the perfect size for one Nuun tablet, also, which I absolutely LOVE! 


Superusers do not speak on behalf of REI and may have received
one or more gifts or other benefits from the co-op.