MSR DromLite Bag

The MSR DromLite Bag is a collapsible water storage bag holding 2 litres at 130 g, built around a 3-in-1 cap that handles filling, drinking and pouring without swapping fittings. Once empty it folds down to roughly the size of its own cap, so it stows flat in a pocket or the bottom of a pack instead of carrying dead volume. The screw closure and BPA- and BPS-free construction round out a design meant purely for water storage rather than sipping on the move. This 2 L size sits at the smaller end of MSR's DromLite range, which also comes in 4 L and 6 L — useful to know if you're provisioning for a group or a basecamp rather than a single hiker. It's built for carrying and storing water between source and camp, not for drinking one-handed while walking, where a rigid bottle or a soft flask with a bite valve would suit better.