When it comes to the everyday carry essentials, we’re all willing to get bogged down in the details when it comes to what’s considered necessary without factoring in the things people need to get work done on a regular basis. That’s where the Stac Pac Convertible Adventure Pack comes in. It easily converts between Money Belt / Waist Pack / Sling with internal drink holder / Messenger bag whenever you need it to. It’s built with virtually indestructible fabric and made to be waterproof. Most importantly, this insanely flexible carryall is fully expandable to accommodate the largest iPad or a laptop so you can throw it over your shoulder or around your waist with your kit inside knowing full well you can get that last-minute work done if (more likely when) the need arises. As if that Transformers-esque functionality wasn’t enough, the internal drink holder also holds a couple of beers and it packs into itself when you’re not using it for easy storage.