Haven't watched the video yet, but a word of warning: When my mother was young and had to cook for all the farmhands, she made lemonade (no such thing as instant then) in a metal container. They all got very sick from poisoning....a reaction between the metal and the acid in the lemons. From then on, she would never (and never let us) make lemonade in a metal container of any kind or stir with a metal utensil.