Small, water-resistant tubes have been used for years as containers for small survival/E&E kits. The tube form factor makes them easy to stow just about anywhere discreetly. They are often made from machined aluminum or titanium which makes them fairly expensive. OscarDelta developed a solution that capitalizes on the proven tube form factor but that is significantly less expensive. They call them Go Tubes and Deep Carry Tubes.
Both models feature tubular PVC plastic construction with rubber end caps. The Go Tube has a ringed end cap that offers additional carrying options while the Deep Carry Tube has two flush end caps that make it more easily stash-able. These are small enough to be discreet and large enough to carry things like lock bypass tools, compact fishing kits, fire starting materials, emergency cash, or just about anything else that will fit.