Voltrx mixing cups are designed to be cool and durable, and mix quickly, taking only seconds to mix and serve. The plastic is clear and hard (I’ve dropped it a few times). The battery on the mixer is removable and has a long life before needing to be recharged. In addition, the parts inside the mixer rotate so you don’t have to worry about internal damage as the cup becomes harder to clean over time.
This is very convenient for stirring powdered drinks, and it is recommended to wash it first. The base charge is super fast and lasts about a month. Just put in water to stir, press the button, walk away, and it only runs for about 30 seconds. Sometimes it will run twice. The actual mixing “blade” is very light plastic, so it’s not suitable for any task too heavy. But this protein bottle has worked well for me and my protein shakes.