The MSR DromLite Bag is collapsible water storage for the backcountry. Fill, drink, pour: all with the same 3-in-1 cap. Pretty simple and you have 3 different sized bags to choose from. When not in use, it'll compact down to the size of the cap for tucking away in your backpack for later.
So sorry, but only 4 items are allowed for comparison, so we're comparing the first 4. I blame the gnomes and so should you.
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