There is a good deal today on Camelbak water bottles at Target. These are normally about $15 but today you can grab the purple one for only $10. Plus you will get free shipping!
These bottles are BPA free, dishwasher safe and have multiple fill lines for easy measuring.
There is another option for these bottles you might want to look at.
You can also order from Vitacost and the prices start at $10.79. If you are a new customer to Vitacost and you register here, they will send you an email with a coupon code for $10 off a $10 purchase. Your bottle should be as low as $.79 and then shipping is $4.99 making your total $5.78.
Just head over to Vitacost and type in Camelbak to see a bunch of choices. Note the Target bottle is .75L and Vitacost has 1L or .75L.