Love this shaker, received it very quickly and its now my daily driver. I am surprised how easy its to clean, just pour some water shake and its as good as new. The cap fits tightly and it does not leak.
The shaker is completely a bliss. It works well with my protein shakes. The spring inbuilt doesn't leave any residue and blends perfectly well without leaving any lumps. Its value for money and totally leak proof. Easy and cheap option.