My mom gave me my first Lifefactory water bottle in 2007 and I've been using one daily ever since. I've bought different sizes in different colors over the years to match my day's activities and what will fit into the purse I've decided to use. It's important to me to drink clean filtered water during the day and these bottles help me do that. (I have a water filter at home.) Plastic bottles are wasteful and make water taste terrible. Finally, Lifefactory bottles look nice, and the wide mouth make it easy to drink from and also to clean. Great product that I cannot do without!