I’ve tried all shakers but this tops it all! I love the design where you can measure the intake, and the fact that it’s metal so it keeps your shakes cold! I bought two one for me and one for my boyfriend. The suction top makes it so easy to open yet it stays closed if flipped over! I’ve struggled with other shakers where it’s so hard to open with the click. I would recommend this bottle to everyone. This company honestly makes the best products hands down and they are owned by amazing owners who truly care about their customers and the quality of their products.