There's a reason canned cocktails continue to grow in popularity: measuring, mixing, and perfecting a drink on the go can be an arduous process. For those committed to the craft, there's The Cocktail Canteen. This portable, all-in-one solution includes a collapsible jigger, telescoping bar spoon, mini funnel, TSA-compliant glass droplet bottle for bitters or tinctures, and a combination peeler and zester. All of those are held within a compact black canteen, making this a must-pack for the cocktail enthusiast.