maple sap boiling in the pans on an evaporator at different viscosities and colors

design boiling maple syrup sap evaporation cooking evaporator oldfashioned boiler steam rusty homemade healthy eating liquid bubbles sweet food springtime sugar industry agriculture canadian culture heat temperature shack condensation working container business people preparation outdoors day winter cold fire natural phenomenon lifestyle nature lifestyles making metal old antique textured abstract smoke physical structure colors brown dark transparent chimney sunset sunrise