It was never about the straws. The biggest impact of a cocktail is whats in it. Growing, processing and transporting the ingredients is the greatest impact. So drink it all up. For those cocktails with a foam an egg white is used to make the foam with the yolk usually being thrown away (I found this out the hard way doing waste audits of bars). An egg has a carbon footprint of around 200-320 g. The same as four bananas. A free-range egg is 25% worse. So how can we reduce the footprint? Using chickpea water. This little video shows how.