In general, I roll my eyes at one-trick-pony kitchen tools. No one needs a dedicated avocado or apple slicer. But sometimes you do, in fact, run into a single-use item that actually does its job ...
You may have tried duplicating these fancy drinks at home, only to fall short with clumsy steaming wands and battery-powered frothing ... easier than using a steam wand): The Dreo BaristaMaker.