I have owned reusable water bottles for years. I have always been environmentally conscious and hated the idea of buying tap water bottled in chemical laden plastic. Unfortunately, all of the metal and acrylic bottles I have owned imparted a particular taste to my water and I ended up pushing them to the back of my cupboards. I finally gave in to the bkr craze and I am so happy I did! While the bottles seem pricey, they are totally worth it! Everything about the design is perfect. I have already purchased quite a few of the 500 ml's, and i just received the 1L. I will warn you, this thing is pretty massive and quite heavy. I drink a lot of water and the 500mL just wasn't always enough, but the 1L is perfect! I definitely suggest getting a few bkr bottles for yourself, you won't regret it!