On Amazon right now you can get this nice Ello Pure BPA-Free Glass Water Bottle with Lid, 20 oz for just $9.99. These usually run closer to $20 each so this is a great price.
This will ship free with Amazon Prime or qualifies for free Super Saver Shipping with a $35 purchase.
Note: Amazon prices and promotions can change at any time. The price(s) listed in this post is/are subject to change.