Almost perfect bottle. This water bottle keeps cold drinks cold, and warm drinks warm, for a impressively long time. I am using the wide-mouth cap which screws on and off, I toss this in my bag daily and can rely on the bottle to not leak. The flip top lid is great for hot drinks, but the flip top could pop open and spill if you are counting on tossing this bottle in your bag. If you're using a cup holder, or holding it in your hand, the seal is water tight. The straw lid I found to be a bit tough to drink out of, almost like there wasn't enough room for air to flow back into the bottle to replace the liquid you are drinking. It take a lot of effort. I used it once and switched back to the wide-mouth cap.
Rating: [5 of 5 Stars!]