Hi Steve,
I own more water bottles than any reasonable human being should. I would recommend a 1L SIGG bottle for you with a sports cap. It's made out of aluminum and therefore durable, but it's also 100% recyclable. The liner also helps minimize bacteria build-up. A SIGG is a good investment.
You can read more about the history and manufacture of SIGGs
here. It looks like EMS has both the
1L bottle and the
sports cap (which you'd have to buy separately). SIGGs are also available from Amazon and dozens of other places online. I know that Whole Foods and Uncle Dan's camping stores also have them.