Cones filled with marshmallow-almond popcorn stand in a paper-wrapped aluminum-foil box with small holes making them ideal for bake sales or parties.
Butter a large bowl; add popcorn and nuts. Melt butter in a medium saucepan over medium heat. Add marshmallows; cook, stirring, until melted. Pour over popcorn mixture; stir to coat evenly. Using buttered hands, fill cones with mixture, shaping top into a ball. Stand cones in a cardboard box with holes cut out of top; let cool.