The Klean Kanteen water bottle is the best water bottle I've ever used because it keeps your water tasting pure and fresh. Klean Kanteen water bottles are made from stainless steel which is - easy to clean, durable, inert, sanitary, toxin-free, and non-leaching. The Klean Kanteen is the ultimate Green Gift because it's a stainless steel reusuable water bottle alternative. Avoid using plastics! Plastics in landfills and oceans are one of the most alarming of today’s environmental stories. You can find out more about Klean Kanteens and purchase them at www.TahoeMountainSports.com. (via tahoemountainsports.com)

Steel. Totally trumps that other common metal waterbottle material. I forget what it's called ....

I use mine every day. it's not too big so I can fit it into my cooler that I bring to work everyday.

It's slim enough to fit in standard sport bottle carriers and bicycle bottle cages. But the mouth is large enough to let you put in ice cubes.