When camping out for a night, there’s nothing like a hot cup of coffee in the morning or a warm meal in the evening. Even on a single day trip, you may want to have a warm lunch or an afternoon tea. Unfortunately, a cooking kit takes up quite a lot of weight and space speaking in ultralight terms. Carrying an extra 700g or more for just a cup of tea or a single meal seems unreasonable. Luckily there is a solution for those of us who can’t live without anything warm in their bellies. Here’s what I use.