Originally Posted By: Arney
I was just having a conversation with a coworker about her Kleen Kanteen the other day. She used to fill up her Nalgene from the chilled water cooler in the morning and sip from that at her desk throughout the day. She says that after she switched to the Kleen Kanteen, she thought that the water stayed cooler longer.

However, being uninsulated, I doubt that this would be the case in other situations, like strapped to the outside of your pack with the hot sun beating down on it.

Better still go to the local supermarket and buy a bottle of fizzy water, I like Kiwi Strawberry, and drink it and then use the bottle for water. The plastic used is tougher then the plastic used in a bottle of water, as they have to hold some pressure. Then just clean as need.
cheers