Seemed like a nice idea but - LEAKS

It has leaked at the seal from the first day I used it. It just would not tighten up enough to keep the oil in. It now has a crack top to bottom round the base so leaks so badly it can't be used. Fortunately it was a present so I'm not out of pocket. I certainly wouldn't have another. Screw top jam jar and pestle and mortar more than covers anything the shaker is suppose to do.