The Polar Ergo Leaves water bottle opens in an easy and unique way. Just twist the top all the way to close it and twist just about half way back to open it wide enough to drink from. The water doesn’t spill out. The only issue I had with this bottle is not realizing how much I opened it and spilling water on myself. Not a huge deal when I’m in workout clothes and sweaty, and this happened only a couple times. I also like the looped elastic handle by which you can carry it. The Polar bottle is insulated so your beverage stays cool. Between the insulation and easy-to-carry factors, this is a bottle I’d bring with me just walking around the city or going to the gym. Free of BPA and Phthalate. Retails for $18.99.