I use this ALL the time. Bought several for gifts for my adult children. I have NEVER had it leak. One simply has to properly tighten the lid. BUT someone apparently threw out the container. So the rest of the parts are lonely!
There should be a gasket of some sort inside the base where the bottle screws into it. Without a gasket, when shaking the bottle to mix up batter, there are leaks from the "seal" between the base and bottle causing small drops of batter to fly everywhere.
We are sorry to hear about the leaking you have experienced. We would love to take a look at this for you. Please fill out a warranty claim at whiskware.com and a representative would be happy to look into this.
The metal ball mixes the batter just as it should be for pancakes—blended but not over mixed. (Over mixing makes them tough.) Same for crepes. I also mix up muffins with this for the same reason - the texture of the finished product is 100%. I found it very easy to clean, just rinse and then fill with hot water, a little dish soap, the wire ball then screw the top on it and shake.
It does not mix the batter throughly with shaking. Also difficult to get all batter out. Nice to pour batter but more work than it’s worth.
We appreciate your feedback and are sorry that the bottle has not met your expectations. For any additional questions or concerns, please reach out to firstname.lastname@example.org.