The neck of the squeeze bags looks pretty small. How do you fill them up from small water sources like the 18" wide brooks that are common in the back country?
rye_a,
One option: You could use an old platypus liter or half liter that has ruptured. Cut the bottom off and you can use it as a lightweight, pliable water scoop for those skinny water situations. The corners allow for a good pour. Just roll it up with the dirty bags when done.