A simple but brilliant idea. You can build such a stove from scraps of a large-diameter tin pipe, from old galvanized buckets or even from cans, only large enough. Anything can burn in such a furnace, the temperature is reached very high, and the fuel required is half less than usual.
A portable stove in the country will help out a lot, it’s not difficult to take a bucket for a picnic or fishing, and you can cook food on it very quickly. The main thing is that you do not need to mess with the fire, if the weather is a little damp, this is especially important. Making it yourself is not difficult, instructions are on the Internet.