Thats a flash looking canteen.
These days I mainly use aluminium bottles similar to the Sigg bottles, but the Sigg's are a bit expensive here.
I use 750ml Avanti bottles and 1 litre Jackaroo bottles. (sorry-I work in metric)
The 750ml Avanti's are similar sized to the plastic sports bottle that are common these days - roughly about 25cm tall and 7cm across the bottom. I use a nylon belt pouch with a elastic loop to hold it firm that I bought from a camping shop. The Avanti's came with both the plastic stopper with a loop and the sipper stopper that you pull up to sip from. You can attach a caribiner to the loop or put a cord through as I do when its in the pockets on my pack.
A few years back I had an aluminium canteen that was curved slightly like a peanut so it curved around the body a bit. It was styled a bit like the military canteens, but the nylon holster it came with was a pain. That might be a bit more comfortable.