I asked my dad once why he doesn't just get they chocolate syrup to make his own chocolate milk. His response was the syrup bottle takes up space, it's just easier to have the jug of chocolate milk. When I pointed out that he is using more space with a jug of plain milk and a jug of chocolate milk he told me to fuck off and said that it wasn't any of my business how another man manages his fridge. He wasn't hostile or anything, we give each other greif as often as possible.