Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Great water bottle

I love my little purple CamelBak so much that I bought the .75L since the .5L isn't always large enough. It's especially handy when driving and fits in my cupholder. One warning: if you suffer from jaw pain you may find that using the bite valve exacerbates your jaw pain. I have intermittent jaw pain and on those days drinking from the CamelBak hurts.