Product review (3 stars): Prefer the Flip Cap
I bought, and lost and eventually found my Zulu Core Glass Water Bottle with Flip Cap. I loved it so much that when I lost it, I had to replace it. I accidentally replaced it with the Quick Cap version. I am not as sold on this version as I am the flip cap version. I'm a mother of a 4-year-old and often find that I only have one hand available. The Flip Cap is much more convenient to use with one hand and stays attached to the bottle. The Quick-Cap is not quite so convenient. However, the bottle is still same quality that I've come to love