7. Stove from Tin Can
You can create this stove that you can carry in your pocket easily. All you need is an empty tin some card board and some wax to melt. You need to take the tin and then make the cardboard in shape of waves inside the tin and fill the gaps with wax. The wax will slow the burning speed of card board and give you more area of flame of the size of the tin as shown in picture.