Liquid coffee is invariably the most popular way to consume the energy-boosting ingredient today, but those chewable energy bars from the days of yore are still around. An Insider article from 2017 introduced Go Cubes, which are “chewable coffee cubes with a fluffy, gummy texture,” and according to the product's sales listing on Jebiga, the cubes come in mocha, “pure drip,” and latte flavors.