This Review Title is 5 Month Life Expectancy at Best and the content is: Bought two, one in June, the other in October of 2021. The one purchased in June died right before the October purchase (return window closed), so I bought another thinking it was a fluke… it wasn’t. Seems they last about 5 months, and that’s it. I’m sure it’ll last even less for someone that isn’t using it just once or twice a week for hobby paint (about the same size as a nail polish bottle). The battery option is also useless, even when they’re new, the batteries barely shake it at all. You’re better off just holding the paint with your teeth and sitting on a vibrator..There are other information for this review, one is This reviewer did purchase it and the other is 2 people think this review is helpful.