HydraPak - SEEKER 3L (Mammoth)

Used it as a makeshift cooler for a summit picnic—ice held up way better than I expected in that heat. The 3L size fits perfectly in my pack's hydration sleeve, and it's genuinely light enough that I forget it's there until I need a sip.

Carried it strapped to the outside of my pack on a wet, muddy trail and the weatherproofing held up flawlessly, everything inside stayed bone dry. It’s also surprisingly light for 3 liters, and the wide opening makes it a cinch to fill from a stream.

Filled it with ice before a hike in the sun and it kept the water cold for hours, which I didn't expect from a 3L bladder. The roll-top closure makes it stupidly easy to squeeze into my daypack's side pocket. Weight is barely noticeable even when full.