I love the 16oz bottles. They are easy to use, feel really solid and came securely packaged. It's helpful to pull them up in the morning or night and add a slice of lemon/cucumber for a lightly flavored water. It's also helpful to track my intake. If I get through all 4, I've met my minimum water goal. I usually have these prepped alongside my steel tumbler with some flavor in it or vice versa so I get enough water.