These are great bottles, I love the straw top and have several of these. They are my goto for travel, the gym, work, etc. So why 4 star vs. 5? Simple, the new ones I have recently purchased have a solid plastic straw top vs. the softer rubber top of the older ones. While they work the same, the plastic flip tops are less comfortable vs. the silicone rubber older style. Still a recommended product in any configuration!
Rating:
[4 of 5 Stars!]