I ordered the jet boil zip from Outdoor Gb in the afternoon and it arrived the next lunchtime, a day early. Really fast service. Perfect. The gas canisters are sold separately and obviously the unit won't work without one. It's easy to put together and boils up a cup of water in about a minute. Perfect for making a quick coffee when you're watching your kids sports practices and matches. My only negative is that I wish I'd chosen a model with the auto ignition as it can be frustrating trying to light the gas when your match blows out.