I work out three times a week and have to have my bottled water, but between worrying about chemicals (BPA) leaching from plastic bottles and the landfills being overrun by water bottles I knew I needed to find an alternative.
I have a 32 ounce Nalgene bottle, but it isn't all that Convienient when you are on the treadmill. I found a company called Klean Kanteen that makes a stainless steel bottle with a variety of different lids. They have a sports cap lid that is just like the convenient water bottles I am used to. The 27 ounce stainless steel container even fits is standard cup holders. I was sold.
I ordered two and within a week I was enjoying fresh water without ruining the environment.
These bottles do not leak, but the lids can be a bit tricky to get off. My husbands bottle has a lid that I can barely remove while mine comes off relatively easily. The sports bottle does make a whistling sound when you are drinking out of it so be warned. You will soon get used to it.
The water always tastes so fresh from the stainless steel kanteen I find myself drinking more then I used to. Another benefit is if the Klean Kanteen falls it will not spill. So pets and babies feel free to knock the water bottle around.