Discount Retail Chain Aldi USA is offering 'blind boxes' in four themes: snack, protein, fiber, and mystery. Aldi is tapping into blind box culture with a limited-time promotion that will allow shoppers to claim one of four product-themed boxes to be released daily via a special website. From June 22 through June 25, a new Aldi Blind Box will be released at 12 p.m. Eastern time, which can be claimed by visiting Aldiblindbox.com. Winning boxes, which are free, will be shipped