Superman Growler

[magnethead]

Good side by side blog with a standard glass growler. The vacuum walled growler are great if you need to keep your brew at serving temp for a few days

http://www.hbfca.com/2013/06/hands-on-lifeline-64-oz-double-wall.html

[delzep]

Its a flask yeah?

[RichC]

Its a flask yeah?

looks like it'd be perfect for bringing a stew hiking

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[magnethead]

ok, It's a little on the big side at 1.9L

Its a flask yeah?

Once it's been anointed with beer, It's a Growler...but like everything it depends on your definition.....

Maybe you were thinking of this one 

Growler

Distended vertical bacon sandwich, usually badly in need of attention. See also badly packed kebab.

"Mummy, why did that lady just growl at me?"

by Garth Mortimer November 17, 2003

Northern Brewer are sitting on the fence by calling it a 'Flask growler'
http://www.northernbrewer.com/shop/hydroflask-growler.html


Here's the official beer history of the Growler....It started off in Metal rather than glass apparantly, but maybe that's just american history 
http://www.beeradvocate.com/articles/384/


EDIT: From a functional point of view, you want your growler to transport beer and keep it cool at the same time, in this regard, this Flask ;p growler is a champion!! No coolbox needed