Sometimes Sci-Fi becomes real life. Available in powder or pre-mixed liquid forms, Soylent provides all the nutrition you need, including essentials like proteins, healthy fats, slow-metabolizing carbs for energy, vitamins, and minerals. And while most of us are likely to have a cup/bottle when we're too lazy to make real food, you could actually consume it, water, and nothing else and live a perfectly healthy lifestyle (or so the fine print says). It's also making its mark in Silicon Valley, becoming popular with programmers and other digital insurgents who use it in place of time-wasting meals to fuel marathon coding sessions. However you use it, you'll probably want to have something around to flavor it with, as while it's not necessarily "bad", it does leave at least one part of your body yearning for satisfaction: your taste buds.