The power pack packs clips easily to the exterior when removed to create a cook stove that is 7.5 inches tall by 4.75 inches diameter, and weighs only 1lb 10 ounces
Consider the humble camping stove. It requires fuel - perhaps some unwieldy bottle that air carriers object strongly to. Maybe it needs batteries to run a fan, or billows out smoke so you smell like smoked sweatshirt for the rest of the trip. The solution might be the BioLite stove - it's a collapsible wood-burning cook stove that uses almost any forest-found fuel and converts its own heat energy into electricity to achieve efficient combustion with ultra-low emissions.