4.0 out of 5 stars
Great for coffee, 8 Jan 2013
I use this cap on my Kleen Kanteen bottle for my morning cappuccino. I pick up a coffee on my bicycle, put the cap on, drop the flask in my bottle cage and cycle a further 4 miles to work. Cap does a good job of maintaining heat, preventing leaks and you can take a sip at traffic lights with a flick of the catch.
It won't stop liquid dribbling out if you turn the flask upside down or knock it over but it's great in normal use.
The flask itself keeps coffee warm for over an hour easily even in below freezing temperatures.