I like this water bottle because it's small enough to fit in the cup holders on most backpacks and for my young kids to hold onto. Also, it doesn't weigh a lot and the lid is easy for my children to open. My kids like the bottle because the spout allows the water to pour out and does not require suction. The stopper to prevent leaks is in the lid, so it will spill if the lid isn't closed all the way. However, there is a latch to ensure that the lid is tight. I have two of these bottles, and both have been used a lot and been through the dishwasher several times - so far, so good!