“Blackout in a can.” That’s what kids call the fruity caffeinated-alcohol drinks that offer a cheap, fast way to get drunk and party all night. As safety concerns grow, so does the pressure to pull these potent products from store shelves. Oklahoma, Washington, Utah, and Michigan recently banned the drinks. Beverage retailers in Indiana are lobbying their state to do the same; Pennsylvania has asked state-run liquor stores to voluntarily stop selling them. Meanwhile, pressure is mounting on the FDA to finish its yearlong investigation into the drinks’ safety.