24oz GeoPress® Ti Purifier

Filled it from a muddy creek on a backpacking trip and the water came out completely clear and tasteless. The fact that it doubles as a cook pot meant I boiled water for coffee right after filtering, which saved me from carrying two separate pieces of gear. Weighs practically nothing in my pack, so

The coffee press attachment is surprisingly sturdy and brews a clean cup right on the trail. I've used it on three trips now, and the titanium body feels bombproof without being too heavy.

I was skeptical about using it as a cook pot, but it handled a quick boil for coffee on my last camping trip without any metallic taste. The built-in filter mechanism is impressively smooth and fast.