Kyoku Blender

It's easy to use and clean. The "blade" inside is not a sharp metal blade. It's a plastic whisk-type thing. So if you add your liquid and a powder only, you'll get a smooth shake. This isn't meant to break up hard ingredients. Once in awhile, I open the lid and run a spoon along the top edges to make sure all the powder gets incorporated, but it's only traces of powder. This blender mixes it well. When you press and hold the button, it runs and stops on its own, or you can manually stop it by pressing the button. If you drink your shakes by mixing powder and liquid only, this blender is the best! To clean it, I rinse it out carefully and run the blender with the lid on with some water and soap inside, and then rinse it out again. - Jennifer