They make both double wall and single wall versions. When you look at the website's source code it lists the bottles as:
"Standard 38oz Single Wall"
"Shorty 24oz Single Wall"
"Commuter 24oz Single Wall"
"Backpacker 32oz Single Wall"
Though, Falcon please still shoot them an e-mail to make sure they aren't coated.
Why don't you try the Kleen Kanteen?
That looks good as well, but I would prefer it to have a standard Nalgene style top.