From product images, cover is fine. As other reviewers say, there is difficult closing it. The worst is that the product images do not show you there are plastic wedges underneath the cap (that is meant to help protein dissolve), which makes the cap extremely hard to clean. This leads to a bad smelling bottle and attracts ants.  Aesthetically pleasing bottle but really impractical cap.

I used this for merely two months before the cap broke. This is a terrible product. Please save your money and buy other shakers from other brands.

I have been using this bottle for probably half a year and the lid started to "worn out*. It has already been tearing apart, the lid doesn't look so strong to withstand long period of time. Now I have difficulty to close it and require to purchase another bottle. Other than that, I really like the stainless steel bottom half. It kept my beverage very cold if I want to, also good at withstand drops and hit by anything.

It's made of metal, so if you add cold water, it'll be really cold and if you add hot water, the bottle will be freaking hot. What a poor choice of material, with no insulation at all. It just looks aesthetically appealing

Got it less than a month and the plastic lid is broken. very fragile.