Copper bottle

We can easily deduce the recipe for this. Weld tightly and design to withstand pressure, so let's contain all the gases that are less viscous than the dragon's breath. I like the steam from a yellow rod or a withered rose, and it can also capture the scent of flowers or the pheromones that bees release when they are angry. When it snows, swing the copper bottle vigorously to collect powdered snow.