I was not that happy with the functionality of the water bottle. It required much to much suction to get up the straw and I felt like I ended up with too much air in my stomach. In addition, during breathless workout during spin classes u need to quickly sip the water and move on,. Took too much time and energy to get thru the straw. Also if u picked up and tipped up, it would end up spilling all over you.. One consolation is the Water did taste good ..