On the Go Bottle Warmer - can I take it on a plane?

[geochick]

Has anyone taken the Prince Lionheart On the Go Bottle Warmer on an airplane? It's the self-heating warmer. I am just wondering if they allow something like that (chemical reaction causes heat) on a plane. Thanks.

[Momof3Labs]

I'd think it would be allowed, but why not just ask the flight attendants for a cup of hot water to warm the bottle?