Try the same design but using a short soda can with a tub candle.
Cut off the wings made when the opening is cut and instead cut a center section of plastic soda bottle and split the section so it will slip over the
soda can to act as a window. The spring of the plastic will hold the window in place. Punch an extra vent hole or two low on the can to draw fresh air, you already have the pop top opening to provide a exhaust vent and hang loop, or make a bail hanger.
If you do not cut the window opening to large you can set a metal cup on top of the lantern to act as a cup warmer. I can put a 16oz. Sierra cup on top of mine. It you want to try the warmer you will need to add a couple top side vents.