The Twist uses cartridges of nitrous oxide (yes, whippits) to generate nine bars of pressure. This even stream of happy gas forces hot water through a compressed puck of grounds or an espresso pod. It makes only double doses, but a forked spout can split the portion. It’s dead easy to operate, and since a cartridge makes four pours, there’s not a lot of fiddling between rounds. Best yet, the thick, rich brew is just as good as what you’d get from a $2,000 countertop machine.