Pop it in the freezer. When you're ready to serve, pour into a rocks glass with one large or two standard ice cubes. Run a strip of lemon zest around the rim of the glass, then pop it into the drink.

After London trials this summer, he hopes it will be on sale by 2026, carrying chilled beers, ciders, white wines, cocktails or even just soft drinks.

Cold drinks might be your go-to refreshment on hot days or during parties, but beneath their fizzy charm lies a hidden risk - bone damage. While they offer a momentary sense of cool relief ...