Will future generations look at how big corporations do business today like drug dealers - have a product and then try and hijack the brain into continuously wanting or using said product - like how medical herion and cocaine were used as acceptable medical treatments in , I hopefully, assume ignorance...
Ice floating and cooling the upper part of a drink should start a natural convection type cycle which cools the whole drink. If the ice sank, you'd have a very warm surface layer. Never thought about this with focus before 😅