Naked Life is an Australian brand that's made a name for itself in the zero-sugar, low-calorie AF cocktail space. The Passion Fruit Martini comes in 250ml cans and clocks in at around 2 calories per 100ml, sweetened with erythritol and stevia rather than sugar. The flavour profile is tangy passionfruit up front, softened by creamy vanilla and a citrus lift from lime. It's lightly sparkling — more effervescent than still, which keeps things bright. It doesn't taste like a real martini (there's no alcohol warmth), but as a palate-refreshing, low-calorie AF can it does the job well. Zero sugar and genuinely low calorie is hard to argue with. Available in the UK through the Naked Life UK site and a handful of specialist AF retailers.