Made from nontoxic, unlined stainless steel, the Klean Kanteen Classic is a popular bottle that's durable and dishwasher-safe. You get a choice of a polypropylene sport, loop or flat cap -- all free of bisphenol A (BPA), a chemical that has been the source of much controversy over possible health concerns -- or you can purchase a stainless-steel loop or flat cap (*Est. $6). Reviewers say the Klean Kanteen is remarkably durable for a metal water bottle; it suffers a few minor dents in drop tests and survives being run over by a car. Most comparative tests that we've seen indicate the Klean Kanteen is more durable and has a wider mouth than the popular Sigg water bottles, so it easily accommodates ice cubes.
Owners give the Klean Kanteen high marks, with most saying the bottle doesn't impart a metallic taste to their water and a tight seal helps prevent leaks. Because it's not insulated, however, the Klean Kanteen does sweat in hot weather, aggravating some reviewers. Some also report that the sports cap makes an annoying squeak. Overall, though, owners give the Klean Kanteen excellent reviews. To save some money, take a look at the top-rated CamelBak Better Bottle (*Est. $14 for 25-oz. bottle). This BPA-free plastic bottle gets high marks for durability and is significantly cheaper than the Klean Kanteen.
Many consumers consider both Sigg and Klean Kanteen when choosing a metal water bottle, and several publications conduct comparative reviews of the two. Wired, Men's Journal and Time magazines, as well as the blog Gardenaut and Slate.com, all test both metal water bottles. Wired's test is the best source, since it provides a numerical rating and great details on its testing. User reviews of the Klean Kanteen are plentiful, especially at Amazon.com.
The Klean Kanteen gets the highest rating in this comparative test conducted by Wired. Among the four water bottles tested, reviewer Daniel Dumas says the Klean Kanteen is the "toughest."
Review: Bottle Shock: 4 BPA-Free Water Bottles Endure Torture Testing, Daniel Dumas, Oct. 20, 2008
2. Men's Journal
Men's Journal calls the Klean Kanteen "simple but bulletproof," although it sweats when filled with cold liquids and the lid can be squeaky.
Review: Reviewed: Water Bottles, Tobin Hack, Oct. 13, 2008
3. Gardenaut (blog)
This methodical rundown praises the Klean Kanteen for its simple design, small stainless-steel base (which fits in most cup holders) and durability. Though it receives minor dents when dropped, the dents add character, according to blogger Jeremiah McNichols.
Review: BPA-Free Water Bottle Showdown, Jeremiah McNichols, May 12, 2008
This roundup calls the Klean Kanteen water bottle a reliable choice, saying it resists dents, can survive dishwashers and "fits just about anywhere." Water was said to taste metallic after sitting in the bottle overnight, however.
Review: Message in a Bottle, Laura Moser, Aug. 21, 2007
HuffingtonPost.com provides a wide array of reusable bottle favorites, though Armstrong doesn't clarify exactly how the bottles were chosen. The reviewer praises the Klean Kanteen for being durable, lightweight and easy to clean.
Review: The Best Reusable Water Bottles, Lindsay Armstrong, Jan. 29, 2010
6. Time magazine
Reviewer Hilary Hylton says the Klean Kanteen is her favorite of five water bottles, besting the Sigg Traveler and CamelBak Better Bottle. She finds it sturdy and appreciates that the opening is large enough for ice cubes.
Review: Top 5 Eco-Friendly Water Bottles, Hilary Hylton, Dec. 11, 2008
Wendy Bumgardner notes that the stainless-steel Klean Kanteen's main advantage is that it's nonleaching and toxin-free. It's not clear if Bumgardner used this bottle herself. (Note: ConsumerSearch is owned by About.com, but the two don't share an editorial affiliation.)
Review: BPA-Free Water Bottles, Wendy Bumgardner, Updated Jan. 24, 2011
8. The New York Times
In this test, the Klean Kanteen is deemed durable and stylish, although tester Eric Linxweiler thinks the opening can allow a little too much water to come out at once.
Review: Gear Test with Eric Linxweiler, Outdoorsman; Not Simply a Water Bottle, Yishane Lee, Nov. 6, 2008
More than 1,300 owners posting here are highly satisfied with the Klean Kanteen bottle, noting that it's easy to clean, light and leakproof. Some owners complain about excessive sweating in hot weather.
Review: Klean Kanteen Stainless Steel Water Bottle, Contributors to Amazon.com