(The Flex Straw Cap was fiddly to use and tended to leak lightly, so if you want a straw pick you might prefer the Owala or Klean Kanteen bottle.) But we prefer the Flex Chug Cap for its ...

the Klean Kanteen Classic is compatible with six different caps, all of which feature a carry handle. The bottle was one of our overall top performers in the temperature test; the water only rose ...