I've been using this insulated water bottle daily for a few weeks and it does exactly what it promises. Cold drinks stay cold all day, and hot tea is still warm hours later. The wide opening makes filling and cleaning easy, and the leakproof lid gives me confidence tossing it in my bag. I really like the vegan leather strap on the lid, it makes carrying simple. The stainless steel feels sturdy and there's no plastic aftertaste. Only minor thing is the 17 fl oz size empties fast if you drink a lot, but it's great for commuting.