Keeps shakes cold! no leaks! sleek design - very happy i made this purchase

Looks very cool! But that's the only positive thing about this shaker. Here are some other major issues with the design: 1- The litre marker is indented from the outside and inside, but of course because it's metal it's hard to see how much water you're actually filling up. 2- the flap lid feels like it's made of cheap plastic. It's difficult to open and bends a little as you try to push your thumbs against it. I've used it twice and it hasn't broken yet, but don't see it lasting long 3- the lid itself has a sealant inside it to avoid leakage. However, in my shaker this is loose, so my shaker leaks... 4- the inside of the lid - the separator - which helps mix is attached to the lid, which makes cleaning the thing so difficult unless you have a special thin bottle cleaner Ultimately, it just doesn't seem user friendly and doesn't look to have been designed with end customers in mind

Quality is so so good