This wonderful gadget is actually a high-powered milk frother made by Bonjour. It used to be sold by Lotion Crafter, but they discontinued it sometime in 2018 (I think…). You can now purchase it on US Amazon. I’ve tried quite a few hand-powered milk frothers and this one kicks serious butt over all of them in the power department. It has the power to thoroughly blend viscous mixtures for extended periods of time, while most milk frothers struggle with anything much thicker than milk.
If you’re looking for one of your own be sure to get the model that takes four AA batteries, not the one that takes two! The extra batteries are a big part of the extra power.