Overall, the shaker is very good, easy to clean, and lightweight. The only thing that disappointed me is that the label states that it is not intended for use with hot beverages, only cold ones. This was not mentioned in the product description, so I assumed that because it is made of metal, it could also be used for hot coffee, tea, etc. But that is not the case, so be careful if you want to use it for hot drinks.

UPDATE: Unfortunately, it does not keep the temperature of cold drinks for a long time, especially during the summer. They heat up quickly, so it cannot be used as a thermos effectively, only as a shaker.