I've been using the EXPLORER BOTTLE on hikes and my daily commute for a few weeks now. The 22 fl oz size is right for a half-day out, and drinks stayed cold all day in warm weather. The wide, compact shape sits steady on uneven ground, and the paracord loop makes it easy to clip to my pack. It's genuinely leak proof in my bag, and the plastic free contact lid is a nice touch. The 3.5in diameter slides into my backpack side pocket without a fight. Solid, no-nonsense bottle.