I found this bladder and it makes perfect sence to me.
I have an Osprey Atmos 65 with the curved back. I also have the old Osprey bladder, a 3L. Filled up it takes up considerable room, and with the s-curve of the pack it is wasted space. Since the side pockets are pretty useless of a water bottle, I thought this may work.
On the AT you do not need 3L however in other places you do.
Here is the link.
http://sourceoutdoor.com/product.php?id_product=89
I know it opens the whole bottles vs bladder debate and I'm not into that. I know what works for me.
Any opinions are greatly appreciated and very welcome.
Best,
Floyd