Ninja Slushi review: Is the popular frozen drink maker worth it?

Slushies have grown up. No longer reserved for cinema lobbies or servo stops, the grown-up frozen cocktail has cemented its place on the modern drinks list — from Bar Primi’s Frosé in New York to the yuzu Margaritas of Tokyo’s izakayas. But replicating that fine-crushed chilled sip at home requires the right tool. Enter: the Ninja Slushi Professional Frozen Drink Maker — a kitchen benchtop appliance garnering serious buzz on social media and drawing interest from savvy…